Zucchini Hamburger Casserole

Why You’ll Love This Recipe

This zucchini hamburger casserole is perfect for anyone seeking a satisfying, flavorful dish with minimal effort. Packed with fresh ingredients like zucchini, ground beef, and rich cheeses, it’s a meal that brings comfort without the guilt. The balance of savory beef, tangy tomato sauce, and melty cheese creates a mouthwatering dish that everyone will enjoy. It’s not only a great way to use summer zucchini, but it also makes for excellent leftovers and is freezer-friendly.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the casserole:

• 1 lb ground beef

• 3 medium zucchinis, sliced into ¼-inch rounds

• 1 small yellow onion, finely chopped

• 2 cloves garlic, minced

• 1 can (14 oz) crushed tomatoes

• 1 tablespoon tomato paste

• 1 tablespoon olive oil

• 1 teaspoon dried basil

• 1 teaspoon dried oregano

• ½ teaspoon red pepper flakes (optional)

• Salt and black pepper, to taste

For the topping:

• 1 ½ cups shredded mozzarella cheese

• ½ cup grated Parmesan cheese

Optional Add-ins:

• 1 cup sliced mushrooms

• ½ cup chopped bell pepper

• ½ cup ricotta or cottage cheese

Directions

1. Preheat oven: Preheat to 375°F (190°C). Grease a 9×13-inch baking dish.

2. Prepare zucchini: Slice zucchini and lay on paper towels. Sprinkle lightly with salt and let sit for 10 minutes. Pat dry to remove excess moisture.

3. Cook beef mixture: In a skillet over medium heat, sauté onion in olive oil for 2-3 minutes. Add garlic and cook for 1 more minute. Add ground beef and cook until browned. Drain any excess fat.

4. Add tomato ingredients: Stir in crushed tomatoes, tomato paste, basil, oregano, chili flakes (if using), salt, and pepper. Let the mixture simmer for 5-7 minutes to allow the flavors to meld together.

5. Assemble casserole: Layer the sauce and zucchini slices in the prepared baking dish, alternating the two and ending with sauce on top. Sprinkle the shredded mozzarella and grated Parmesan cheese over the top.

6. Bake: Bake uncovered for 25–30 minutes or until the casserole is bubbly and golden. For a crispier top, broil for an additional 2-3 minutes.

7. Rest and serve: Let the casserole rest for 10 minutes before serving to ensure the best texture and ease of serving.

Servings and Timing

• Servings: 6 servings

• Prep Time: 15 minutes

• Cook Time: 35 minutes

• Total Time: 50 minutes

Variations

• Creamy Option: For an extra creamy casserole, layer ricotta or cottage cheese between the zucchini and beef layers.

• Keto Version: To make this dish keto-friendly, reduce the amount of tomato sauce and add cream cheese to the beef mixture for a richer, lower-carb option.

• Vegetarian Option: Replace the ground beef with a plant-based meat substitute or use a mix of mushrooms, bell peppers, and zucchini for a delicious vegetarian version.

• Add More Veggies: Feel free to add more vegetables, such as chopped bell peppers or sliced mushrooms, for extra flavor and texture.

Storage/Reheating

• Storage: Store leftovers in an airtight container in the refrigerator for up to 3-4 days.

• Reheating: Reheat in the oven at 350°F for 15-20 minutes, or until heated through. You can also microwave individual portions for 1-2 minutes, stirring halfway through.

FAQs

1. Can I use frozen zucchini for this casserole?

While fresh zucchini is ideal, you can use frozen zucchini if needed. Just make sure to thaw and drain the zucchini well to avoid excess moisture.

2. Can I make this casserole ahead of time?

Yes! You can assemble the casserole and store it in the refrigerator for up to 24 hours before baking. This makes it perfect for meal prep.

3. Can I freeze the zucchini hamburger casserole?

Yes, you can assemble the casserole and freeze it before baking. When ready to cook, bake straight from the freezer, adding an extra 10-15 minutes to the baking time.

4. Is this recipe gluten-free?

Yes, this zucchini hamburger casserole is naturally gluten-free, making it a great option for those with gluten sensitivities.

5. How can I prevent the zucchini from becoming soggy?

To prevent a watery texture, make sure to pat the zucchini slices dry after salting them and letting them sit for 10 minutes.

6. Can I use ground turkey or chicken instead of beef?

Absolutely! You can substitute ground beef with ground turkey or chicken for a leaner version of the casserole.

7. Can I add more cheese to this casserole?

Definitely! You can increase the amount of mozzarella or Parmesan cheese for an even cheesier casserole. Adding cheddar or Gruyere can also bring a unique flavor.

8. What can I serve with zucchini hamburger casserole?

This casserole pairs well with a side salad, roasted vegetables, or cauliflower rice for a low-carb meal.

9. How long will leftovers last?

Leftovers can be stored in the fridge for up to 3-4 days. Reheat in the oven or microwave until warmed through.

10. Can I use fresh tomatoes instead of canned crushed tomatoes?

Yes, you can use fresh tomatoes, but make sure to crush them well and cook them down to a sauce-like consistency before adding them to the casserole.

Conclusion

Zucchini Hamburger Casserole is a comforting and nutritious dish that’s perfect for a variety of diets and meal preferences. Whether you’re looking for a low-carb option, want to use up summer zucchini, or simply want a one-pan meal that’s full of flavor, this casserole delivers. It’s easy to make, filling, and versatile, making it a family favorite for years to come!