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    Zucchini Rice Gratin Easy and Healthy Recipe

    Updated: May 18, 2026 by 👩‍🍳chef · This post may contain affiliate links ·

    Zucchini Rice Gratin is a comforting dish that brings together creamy textures and fresh flavors in every bite. With zucchini and rice combined in a savory blend, you can whip this recipe up in just 30 minutes.

    Using just a handful of everyday ingredients, this dish is both simple and satisfying. It works well as a side for your favorite protein or can stand alone as a hearty vegetarian meal. Enjoy the wholesome goodness of zucchini while keeping your cooking time minimal.

    Whether you're planning a quick family dinner, hosting friends, or meal prepping for the week ahead, this gratin fits seamlessly into your routine. Give it a try!

    Zucchini Rice Gratin – creamy dish topped with golden cheese

    Ingredients

    • 2 to 2 ½ lbs zucchini
    • ½ cup uncooked white rice
    • 1 cup onions, minced
    • 5 tablespoons olive oil, divided
    • 2 garlic cloves, minced
    • 2 tablespoons all-purpose flour
    • ½ cup milk, as needed
    • ⅔ cup Parmesan cheese, grated and divided
    • Kosher salt and freshly ground black pepper, to taste
    Fresh ingredients arranged on wooden board

    Instructions

    1. Preheat oven to 325°F and grease a 2-quart baking dish with butter or oil.
    2. Wash zucchini and trim ends. Cut in half lengthwise, then grate and place in a large bowl.
    3. In a large skillet over medium heat, heat 3 tablespoons oil. Cook onions until translucent, about 8-10 minutes. Raise heat and continue cooking until lightly browned.
    4. Add garlic and cook 1 minute more. Add rice and sauté for 2 minutes. Season liberally with salt and pepper.
    5. Add rice mixture to zucchini along with ½ cup milk. Set aside 2 tablespoons of cheese and add the remainder to zucchini mixture. Adjust seasoning as needed and stir to combine.
    6. Transfer to baking dish and cover tightly with foil. Bake until rice is cooked but not mushy, about 50 minutes.
    7. Remove foil, drizzle top with remaining olive oil, and sprinkle on remaining cheese. Bake uncovered until crispy and golden brown, about 10-15 more minutes. You can broil for 1-2 minutes for additional color. Enjoy!
    Mixing ingredients in large bowl

    Why This Recipe Works So Well

    The Right Binding: Eggs play a crucial role in the Zucchini Rice Gratin by acting as a binder, holding the ingredients together while providing moisture. Breadcrumbs add structure and help create a cohesive texture that keeps the gratin from becoming too loose.

    Oven Baking Instead of Frying: Baking in the oven allows for even cooking and browning, which enhances the flavor and texture of the dish. This method reduces added fat and results in a lighter final product compared to frying.

    Reducing Moisture: By squeezing out excess moisture from the zucchini, you improve the crispiness of the gratin. This step ensures that the final dish is not watery and has a satisfying texture.

    Flavor Balance: The combination of ingredients, such as cheese and spices, harmonizes to create a well-rounded flavor profile. The cheese adds richness while the spices enhance the overall taste without overwhelming the dish.

    Time Advantage: This recipe is efficient, allowing you to prepare it quickly with minimal prep work. The straightforward steps keep you focused and minimize cleanup, making it a practical choice for busy nights.

    Cooking Tips

    Tip 1:
    Use fresh zucchini that’s firm and free from blemishes for the best flavor. Fresh produce significantly enhances the dish's overall quality.

    Tip 2:
    For a creamier texture, consider adding a bit of cream cheese or sour cream to the cheese mixture before baking. This can elevate the mouthfeel of the gratin.

    Tip 3:
    Avoid overcooking the zucchini before baking; aim for just a quick sautéed moment to allow for the zucchini to retain some crunch. Overcooked zucchini can become mushy.

    Tip 4:
    A great time-saver is to prep the zucchini rice mixture a day ahead. Just store it in the fridge until you're ready to bake. This lets the flavors meld together nicely.

    Difficulty Level:
    Easy; this recipe is straightforward and doesn't require any advanced cooking techniques.

    Nutrition Note:
    Zucchini is low in calories but provides essential vitamins and minerals. Pairing it with whole grain rice makes for a filling, nutritious side dish.

    Storage

    Room Temperature:
    It's best to avoid leaving the zucchini rice gratin at room temperature for more than 2 hours to maintain safety and freshness.

    Refrigerator:
    Store the leftovers in an airtight container for up to 3-4 days. This helps preserve flavors and moisture.

    Freezer:
    If you want to freeze the gratin, wrap it tightly in plastic wrap and then in foil. It can last up to 3 months. Thaw in the fridge before reheating.

    Reheating:
    Reheat leftovers in a preheated oven at 350°F for about 15-20 minutes, or until heated through. This helps maintain the texture rather than microwaving.

    Variations

    Variation 1:
    Substitute brown rice (1 cup) for a nuttier flavor and more fiber, resulting in a heartier dish.

    Variation 2:
    Add cooked sausage (1 cup) for a meatier option, creating a different flavor profile and protein boost.

    Variation 3:
    Try using kale (2 cups) instead of zucchini for a more earthy taste and added nutrients, offering a different texture.

    Variation 4:
    Incorporate herbs like fresh basil or thyme (1 tablespoon each) to give the gratin a fragrant lift that enhances the overall flavor.

    Serving Suggestions

    Serving Suggestion: Arrange the Zucchini Rice Gratin on a plate to showcase the layers of zucchini and rice, making it visually appealing for your meal.

    Drink Recommendation: Pair it with a refreshing beverage like sparkling water with a slice of lemon or a chilled glass of Sauvignon Blanc for a nice touch.

    Best Occasions: This Zucchini Rice Gratin is perfect for a cozy weeknight dinner, entertaining guests, or even as a dish at a buffet where everyone can help themselves.

    Suitable Side Dishes: Complement the gratin with a crisp green salad, roasted vegetables, or crusty bread to balance the flavors in your meal.

    Fresh gratin served with herbs

    Frequently Asked Questions

    How long should Zucchini Rice Gratin bake in the oven?
    Bake the Zucchini Rice Gratin for about 35-40 minutes at 375°F until it's golden brown and bubbling.

    How do I know when Zucchini Rice Gratin is done?
    You can tell it's done when the top is golden and a knife inserted in the center comes out clean.

    What temperature works best for Zucchini Rice Gratin?
    The best temperature for baking Zucchini Rice Gratin is 375°F, which cooks the dish evenly without burning the top.

    How far in advance can I prepare Zucchini Rice Gratin?
    You can prepare the Zucchini Rice Gratin up to a day in advance and keep it refrigerated until you're ready to bake.

    Can I freeze Zucchini Rice Gratin?
    Yes, you can freeze the gratin. Just make sure to wrap it well and it will last in the freezer for up to three months.

    How long does Zucchini Rice Gratin last in the refrigerator?
    In the refrigerator, Zucchini Rice Gratin will last about 3-5 days when stored in an airtight container.

    Can I prepare Zucchini Rice Gratin the day before?
    Absolutely! Preparing it the day before can actually enhance the flavors, just bake it right before serving.

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    Zucchini Rice Gratin Easy and Healthy Recipe

    Zucchini Rice Gratin ready in 30 minutes! Simple, comforting, and perfect for weeknight dinners. Discover the recipe now!
    Print Recipe Pin Recipe
    Prep Time 10 minutes mins
    Cook Time 1 hour hr
    Total Time 1 hour hr 10 minutes mins
    Servings: 4 servings
    Course: Main Course
    Cuisine: International
    Calories: 250
    Ingredients Equipment Method Nutrition Notes

    Ingredients
      

    • 2 to 2 ½ lbs zucchini
    • ½ cup uncooked white rice
    • 1 cup onions, minced
    • 5 tablespoons olive oil, divided
    • 2 garlic cloves, minced
    • 2 tablespoons all-purpose flour
    • ½ cup milk, as needed
    • ⅔ cup Parmesan cheese, grated and divided
    • Kosher salt and freshly ground black pepper, to taste

    Equipment

    • mixing bowl
    • Skillet
    • Baking Dish
    • Oven
    • Stovetop
    • sharp knife
    • Measuring cups
    • Measuring spoons
    • Grater
    • spatula
    • Foil

    Method
     

    1. Preheat oven to 325°F and grease a 2-quart baking dish with butter or oil.
    2. Wash zucchini and trim ends. Cut in half lengthwise, then grate and place in a large bowl.
    3. In a large skillet over medium heat, heat 3 tablespoons oil. Cook onions until translucent, about 8-10 minutes. Raise heat and continue cooking until lightly browned.
    4. Add garlic and cook 1 minute more. Add rice and sauté for 2 minutes. Season liberally with salt and pepper.
    5. Add rice mixture to zucchini along with ½ cup milk. Set aside 2 tablespoons of cheese and add the remainder to zucchini mixture. Adjust seasoning as needed and stir to combine.
    6. Transfer to baking dish and cover tightly with foil. Bake until rice is cooked but not mushy, about 50 minutes.
    7. Remove foil, drizzle top with remaining olive oil, and sprinkle on remaining cheese. Bake uncovered until crispy and golden brown, about 10-15 more minutes. You can broil for 1-2 minutes for additional color. Enjoy!

    Nutrition

    Serving: 4gCalories: 250kcalCarbohydrates: 32gProtein: 4gFat: 12gSaturated Fat: 7gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gCholesterol: 30mgSodium: 180mgPotassium: 60mgFiber: 1gSugar: 12gVitamin A: 8IUCalcium: 2mgIron: 6mg

    Notes

    Room Temperature:
    It's best to avoid leaving the zucchini rice gratin at room temperature for more than 2 hours to maintain safety and freshness.
    Refrigerator:
    Store the leftovers in an airtight container for up to 3-4 days. This helps preserve flavors and moisture.
    Freezer:
    If you want to freeze the gratin, wrap it tightly in plastic wrap and then in foil. It can last up to 3 months. Thaw in the fridge before reheating.
    Reheating:
    Reheat leftovers in a preheated oven at 350°F for about 15-20 minutes, or until heated through. This helps maintain the texture rather than microwaving.

    Tried this recipe?

    Let us know how it was!

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