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Garden Zucchini Casserole

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Garden Zucchini Casserole

Description

Garden Zucchini Casserole is a comforting, vegetable-packed baked dish that highlights the fresh flavor of zucchini combined with onions, garlic, herbs, cheese, and a crispy breadcrumb topping. It’s perfect as a side dish for grilled meats or as a satisfying vegetarian main course. This casserole is creamy, cheesy, and lightly golden on top while remaining tender and flavorful inside.

Prep Time

  • Prep: 15 minutes
  • Cook: 35 minutes
  • Total: 50 minutes

Servings: 6

Ingredients

  • 4 medium zucchini, thinly sliced
  • 1 small yellow onion, diced
  • 2 cloves garlic, minced
  • 2 tablespoons olive oil
  • 2 large eggs
  • 1 cup shredded mozzarella cheese
  • ½ cup grated Parmesan cheese
  • ½ cup sour cream (or plain Greek yogurt)
  • 1 teaspoon Italian seasoning
  • ½ teaspoon salt
  • ¼ teaspoon black pepper
  • ¼ teaspoon paprika
  • 1 cup seasoned breadcrumbs
  • 2 tablespoons melted butter
  • 2 tablespoons chopped fresh parsley (optional)

Instructions

Step 1: Prepare the Oven

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

Step 2: Cook the Vegetables

Heat olive oil in a large skillet over medium heat.

Add onion and cook for about 4 minutes.

Add garlic and cook for 30 seconds.

Stir in zucchini and cook for 5–6 minutes until slightly softened.

Remove from heat and let cool slightly.

Step 3: Make the Filling

In a large bowl whisk together:

  • Eggs
  • Sour cream
  • Mozzarella
  • Parmesan
  • Italian seasoning
  • Salt
  • Pepper
  • Paprika

Fold in the cooked zucchini mixture.

Step 4: Assemble

Spread mixture evenly into the prepared baking dish.

Mix breadcrumbs with melted butter.

Sprinkle evenly over the casserole.

Step 5: Bake

Bake for 30–35 minutes until bubbling and golden brown.

Broil for 2 minutes if you prefer an extra crispy topping.

Step 6: Rest and Serve

Allow casserole to rest for 10 minutes before serving.

Garnish with fresh parsley.

Recipe Notes

  • Salting sliced zucchini for 15 minutes before cooking helps remove excess moisture.
  • Greek yogurt makes a lighter substitute for sour cream.
  • Fresh garden herbs add extra flavor.
  • Yellow squash can replace half the zucchini.
  • Freshly grated cheese melts more smoothly than pre-shredded varieties.

Tips for Success

  • Avoid overcooking the zucchini before baking.
  • Drain excess liquid from cooked vegetables.
  • Use freshly grated Parmesan for the best flavor.
  • Add cooked mushrooms for extra heartiness.
  • Stir in spinach for additional greens.
  • Bake uncovered for a crisp topping.
  • Let the casserole rest before slicing to help it hold together.

Variations

  • Low-Carb: Replace breadcrumbs with crushed pork rinds or almond flour topping.
  • Spicy: Add crushed red pepper flakes or diced jalapeños.
  • Protein Boost: Mix in cooked shredded chicken or turkey.
  • Mediterranean: Add feta cheese, olives, and sun-dried tomatoes.
  • Herb Garden: Include fresh basil, thyme, and oregano.

Serving Suggestions

  • Grilled chicken
  • Roasted salmon
  • Baked pork chops
  • Garlic bread
  • Mixed green salad
  • Tomato cucumber salad
  • Roasted potatoes

Storage

Refrigerator: Store in an airtight container for up to 4 days.

Freezer: Freeze for up to 2 months.

Reheating: Warm in a 350°F (175°C) oven for 15–20 minutes or microwave individual portions for 2–3 minutes.

Estimated Nutrition (Per Serving)

  • Calories: 245
  • Protein: 11 g
  • Carbohydrates: 17 g
  • Fiber: 2 g
  • Sugars: 5 g
  • Fat: 15 g
  • Saturated Fat: 6 g
  • Cholesterol: 83 mg
  • Sodium: 480 mg
  • Potassium: 420 mg
  • Vitamin A: 12% DV
  • Vitamin C: 28% DV
  • Calcium: 22% DV
  • Iron: 8% DV

Nutrition values are approximate and may vary depending on the ingredients used.

Health Benefits

  • Rich in Vegetables: Zucchini provides vitamins A and C along with antioxidants.
  • Good Source of Calcium: Cheese contributes calcium for healthy bones and teeth.
  • Protein-Packed: Eggs and cheese help promote fullness and support muscle maintenance.
  • Contains Fiber: Helps support healthy digestion and satiety.
  • Heart-Friendly Fats: Olive oil supplies mostly unsaturated fats.
  • Versatile Meal: Can be adapted for lower-carb, higher-protein, or gluten-free diets.

Frequently Asked Questions (Q&A)

Q: Can I make this casserole ahead of time?
A: Yes. Assemble it up to 24 hours in advance, refrigerate, and bake just before serving.

Q: Why is my casserole watery?
A: Zucchini naturally releases water. Salting and draining the slices before cooking, and avoiding overcooking, helps reduce excess moisture.

Q: Can I freeze it?
A: Yes. Cool completely, wrap well, and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

Q: Can I make it gluten-free?
A: Absolutely. Substitute gluten-free breadcrumbs or use a topping made from crushed gluten-free crackers or almond flour.

Q: What cheese works best?
A: Mozzarella provides a creamy texture, while Parmesan adds a savory flavor. Cheddar, Monterey Jack, or Gruyère also work well.

Q: Can I add meat?
A: Yes. Cooked chicken, turkey, ham, bacon, or browned ground beef all pair well with the zucchini mixture.

Q: How do I know when it’s done?
A: The casserole is ready when the center is set, the edges are bubbling, and the breadcrumb topping is golden brown.

Q: Can I use yellow squash instead of zucchini?
A: Yes. Yellow squash can replace some or all of the zucchini with very similar cooking results.

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