Zucchini Herb Casserole

Delight your taste buds with this savory Zucchini Herb Casserole, a wholesome and flavor-packed dish that’s perfect for any occasion. Layers of tender zucchini slices are paired with a vibrant medley of fresh herbs, creamy cheeses, and a golden breadcrumb topping, creating a comforting yet light casserole that’s both nourishing and satisfying. Enhanced by the aromatic combination of garlic, parsley, basil, and thyme, this recipe brings garden-fresh flavors to your table. Quick to prepare and baked to perfection in under an hour, it’s ideal for weeknight dinners or as a standout vegetarian side dish. Whether served on its own or alongside your favorite protein, Zucchini Herb Casserole is a guaranteed crowd-pleaser that celebrates seasonal ingredients in every bite.

Nutriscore Rating: 56/100

Prep Time:20 mins

Cook Time:40 mins

Total Time:60 mins

Servings: 6

Ingredients

• 4 medium (about 6 cups sliced) zucchini
• 2 tablespoons olive oil
• 1 medium, finely chopped yellow onion
• 3 cloves, minced garlic
• 0.25 cup, chopped fresh parsley
• 0.25 cup, chopped fresh basil
• 1 teaspoon, fresh or 0.5 teaspoon dried thyme
• 3 large eggs
• 0.5 cup whole milk
• 0.5 cup grated Parmesan cheese
• 1 cup grated mozzarella cheese
• 0.5 cup breadcrumbs
• 1 teaspoon salt
• 0.5 teaspoon black pepper
• 1 tablespoon, for greasing the dish butter

Directions

Step 1

Preheat your oven to 375°F (190°C). Grease a 9x13-inch casserole dish with butter and set aside.

Step 2

Wash the zucchini thoroughly, then slice them into thin rounds, about 1/4 inch thick. Place the slices on a clean kitchen towel and sprinkle with a pinch of salt. Let them sit for 10 minutes to remove excess moisture, then pat them dry.

Step 3

In a large skillet, heat the olive oil over medium heat. Add the chopped onion and cook for 3-4 minutes until softened. Add the minced garlic and cook for another 1-2 minutes until fragrant.

Step 4

Stir in the parsley, basil, and thyme, and cook for 1 more minute. Remove from heat.

Step 5

In a large mixing bowl, whisk together the eggs, milk, Parmesan cheese, salt, and black pepper until well combined.

Step 6

Add the cooked onion and herb mixture to the egg mixture and stir to combine.

Step 7

Layer half of the zucchini slices in the bottom of the greased casserole dish. Pour half of the egg and herb mixture over the zucchini. Sprinkle with 1/2 cup of mozzarella cheese.

Step 8

Repeat with the remaining zucchini slices, the remaining egg mixture, and the final 1/2 cup of mozzarella cheese.

Step 9

Sprinkle the breadcrumbs evenly over the top of the casserole.

Step 10

Bake in the preheated oven for 35-40 minutes, or until the top is golden and the casserole is set in the center.

Step 11

Remove from the oven and let the casserole sit for 5-10 minutes before serving. Garnish with extra parsley if desired.

Nutrition Facts

Serving size	1341.6 grams (1341.6g)

Amount per serving	% Daily Value*
Calories	1640

Total Fat 98.80g	127%
Saturated Fat 40.80g	204%
Polyunsaturated Fat 3.70g
Cholesterol 726mg	242%
Sodium 11422mg	497%
Total Carbohydrate 117.80g	43%
Dietary Fiber 10.60g	38%
Total Sugars 66.40g
Protein 83.70g	167%

Vitamin D 179IU	895%
Calcium 1702mg	131%
Iron 11mg	59%
Potassium 2296mg	49%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 52.5%

Protein: 19.7%

Carbs: 27.8%