Layered Cheesy Tuna and Zucchini Casserole

Indulge in the perfect blend of creamy, savory goodness with this Layered Cheesy Tuna and Zucchini Casserole. This easy-to-make, gluten-free casserole features tender zucchini slices layered with a rich, protein-packed tuna mixture and a medley of gooey mozzarella, cheddar, and Parmesan cheeses. Enhanced with aromatic spices like garlic, onion powder, and oregano, each bite bursts with comforting flavor. Topped with an optional breadcrumb crust for added crunch, this wholesome dish comes together in just under an hour, making it an ideal weeknight dinner or meal-prep favorite. Serve this hearty, low-carb casserole warm and watch it disappear at the table! Perfect for tuna lovers and casserole enthusiasts alike.

Nutriscore Rating: 49/100

Prep Time:20 mins

Cook Time:35 mins

Total Time:55 mins

Servings: 6

Ingredients

• 3 medium zucchini
• 2 cans canned tuna (drained)
• 2 cups shredded mozzarella cheese
• 1 cup shredded cheddar cheese
• 0.5 cup grated Parmesan cheese
• 1 cup sour cream
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon dried oregano
• 0.5 teaspoon salt
• 0.25 teaspoon black pepper
• 1 tablespoon olive oil
• 0.5 cup breadcrumb topping (optional)

Directions

Step 1

Preheat your oven to 375°F (190°C) and lightly grease a 9x13-inch baking dish with olive oil.

Step 2

Wash the zucchini and slice them into thin, even rounds (approximately 1/8 inch thick). Pat them dry with a kitchen towel to remove excess moisture.

Step 3

In a medium bowl, mix the drained tuna with sour cream, garlic powder, onion powder, dried oregano, salt, and black pepper until well combined.

Step 4

Spread a thin layer of the tuna mixture on the bottom of the prepared baking dish.

Step 5

Arrange a single layer of zucchini slices over the tuna mixture, slightly overlapping the slices.

Step 6

Sprinkle a layer of shredded mozzarella cheese over the zucchini, followed by a sprinkle of cheddar cheese and Parmesan cheese.

Step 7

Repeat the layering process, alternating between the tuna mixture, zucchini slices, and cheeses, until all ingredients are used, finishing with a generous layer of cheese on top.

Step 8

If using breadcrumbs for extra crunch, sprinkle them evenly over the top layer of cheese.

Step 9

Cover the casserole dish with aluminum foil and bake in the preheated oven for 20 minutes.

Step 10

Remove the foil and continue baking for an additional 15 minutes, or until the cheese is golden and bubbly.

Step 11

Let the casserole rest for 5 minutes before serving. Slice into portions and enjoy!

Nutrition Facts

Serving size	(1396.0g)

Amount per serving	% Daily Value*
Calories	2632.8

Total Fat 165.3g	0%
Saturated Fat 95.9g	0%
Polyunsaturated Fat 1.8g
Cholesterol 456.7mg	0%
Sodium 10882.5mg	0%
Total Carbohydrate 160.9g	0%
Dietary Fiber 10.0g	0%
Total Sugars 60.4g
Protein 142.6g	0%

Vitamin D 45.4IU	0%
Calcium 3374.9mg	0%
Iron 7.4mg	0%
Potassium 1626.2mg	0%

*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: 55.1%

Protein: 21.1%

Carbs: 23.8%