Why Is My Zucchini Pizza Casserole Watery?

Zucchini contains a significant amount of water, so insufficient draining is usually responsible for a watery Zucchini Pizza Casserole. After shredding the zucchini, salt it and let it sit for about 10 minutes to draw out excess liquid. Next, squeeze the zucchini firmly in a clean kitchen towel or cheesecloth. Removing as much liquid as possible before combining it with the eggs and cheese is essential. Prebaking the zucchini crust before adding the tomato and meat topping also helps create a firmer casserole. Avoid adding watery vegetables or very thin tomato sauce unless you cook off some of their excess moisture first.

Can I Make Zucchini Pizza Casserole Without Ground Beef?

Yes. Zucchini Pizza Casserole can easily be made without ground beef. For a vegetarian version, replace the meat with sautéed mushrooms, finely chopped cauliflower, bell peppers, or other pizza-friendly vegetables. If you want to use a different protein, ground turkey and ground chicken are lighter alternatives. Italian sausage provides a richer, more strongly seasoned variation. Whichever substitution you choose, cook ingredients that release a lot of water before adding them to the casserole. This helps protect the texture of the zucchini crust.

Can I Prepare Zucchini Pizza Casserole Ahead of Time?

Yes, although baking the complete Zucchini Pizza Casserole before storing it is one of the simplest approaches. Once baked, allow the casserole to cool before covering and refrigerating it. Leftovers can be refrigerated in an airtight container for up to four days. Reheat individual servings in the microwave or warm a larger portion in a 350°F oven until the center reaches 165°F. The casserole can also be frozen after baking and cooling completely. Wrap it securely and freeze for up to three months. Partially thaw it overnight in the refrigerator before reheating for the best results.

Easy Zucchini Pizza Casserole for a Cheesy Dinner

Name: Zucchini Pizza Casserole
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 4 cups shredded unpeeled zucchini; 1/2 teaspoon salt; 2 large eggs; 1/2 cup grated Parmesan cheese; 2 cups shredded part-skim mozzarella cheese, divided; 1 cup shredded cheddar cheese, divided; 1 pound 90% lean ground beef; 1/2 cup chopped onion; 1 can (15 ounces) Italian-style tomato sauce; 1 medium green or red bell pepper, chopped

Description

Zucchini Pizza Casserole is a hearty, cheesy, gluten-free casserole made with a shredded zucchini and cheese crust, savory ground beef, Italian-style tomato sauce, bell pepper, and melted mozzarella and cheddar. It delivers classic pizza flavor in an easy vegetable-packed dinner.

Ingredients

Scale

4 cups shredded unpeeled zucchini
1/2 teaspoon salt
2 large eggs
1/2 cup grated Parmesan cheese
2 cups shredded part-skim mozzarella cheese, divided
1 cup shredded cheddar cheese, divided
1 pound 90% lean ground beef
1/2 cup chopped onion
1 can (15 ounces) Italian-style tomato sauce
1 medium green or red bell pepper, chopped

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Instructions

Preheat the oven to 400°F. Place the shredded zucchini in a colander and sprinkle it with salt. Let it stand for 10 minutes, then squeeze thoroughly to remove as much excess moisture as possible.
Combine the drained zucchini with the eggs, Parmesan cheese, 1 cup mozzarella, and 1/2 cup cheddar cheese.
Press the zucchini mixture evenly into a greased 13×9-inch or 3-quart baking dish. Bake for 20 minutes.
Meanwhile, cook the ground beef and onion in a large saucepan or skillet over medium heat until the beef is no longer pink, breaking it into crumbles as it cooks. Drain excess fat.
Stir the Italian-style tomato sauce into the cooked beef and onion. Spoon the meat sauce evenly over the baked zucchini layer.
Sprinkle the remaining 1 cup mozzarella and 1/2 cup cheddar cheese over the meat sauce, then top with the chopped bell pepper.
Return the casserole to the oven and bake for about 20 minutes longer, or until heated through and the cheese is fully melted.
Let the Zucchini Pizza Casserole rest briefly before slicing and serving.

Notes

Do not skip salting and squeezing the zucchini. Removing excess moisture is the most important step for preventing a watery casserole.
Use a clean kitchen towel or cheesecloth to wring out the shredded zucchini thoroughly.
Yellow summer squash can be substituted for some or all of the zucchini.
Italian sausage, ground turkey, or ground chicken can replace the ground beef.
Add pizza toppings such as pepperoni, cooked mushrooms, olives, or jalapeños for variation.
For a vegetarian version, omit the beef and use cooked mushrooms, cauliflower, peppers, or other vegetables.
Store leftovers in an airtight container in the refrigerator for up to 4 days.
Reheat leftovers until the center reaches 165°F.
The baked and cooled casserole can be wrapped securely and frozen for up to 3 months.

Prep Time: 20 minutes
Cook Time: 40 minutes
Category: Dinner
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 serving (1/8 of casserole)
Calories: 315 kcal
Sugar: 5 g
Sodium: 870 mg
Fat: 19 g
Saturated Fat: 10 g
Unsaturated Fat: 9 g
Trans Fat: 0 g
Carbohydrates: 9 g
Fiber: 2 g
Protein: 27 g
Cholesterol: 97 mg