Skip the takeout and embrace comfort food with a wholesome twist. This tuna zucchini casserole combines fresh zucchini ribbons with protein-packed tuna in a creamy cheese sauce. Not only is it delicious, the zucchini adds nutrition and fiber while the tuna packs a protein punch. This easy weeknight wonder is ready in under an hour, making it a go-to repeat recipe for busy families.

Tuna Zucchini Casserole
Prep Time 10 minutes
Cook Time 50 minutes
Total Time 1 hour
Servings 6
Calories 263 kcal
Ingredients
- 5 medium zucchinis spiralized
- 2 Tbsp. extra virgin olive oil divided
- 1 small yellow onion diced
- 8 oz. cremini mushrooms sliced
- 2 large garlic cloves minced
- 1 Tbsp. all-purpose flour
- 1 cup unsweetened almond milk
- 1 tsp. reduced sodium vegetable base Better Than Bouillon
- 1 tsp. Italian seasoning
- 3/4 cup white cheddar cheese shredded
- 1/4 cup mozzarella shredded
- 2 5 oz. cans of solid albacore tuna drained
- 1/2 cup seasoned bread crumbs
- Salt to taste
- Pepper to taste
- Parsley chopped (for garnish)
- Lemons sliced (for garnish)
Instructions
-
Preheat oven to 350 degrees F.
-
Place spiralized zucchini on parchment lined baking sheet. Bake approximately 20 mins to remove excess water.
-
While zucchini is baking, heat 1 Tbsp. extra virgin olive oil in large pan over medium heat. Sauté onions and mushrooms 5 minutes or until onions are translucent and mushrooms are just tender.
-
Add garlic to pan and cook 1 minute. Season with salt and pepper to taste.
-
Stir in 1 Tbsp. flour followed by 1 cup unsweetened almond milk, 1 tsp. Better Than Bouillon and 1 tsp. Italian seasoning.
-
Add white cheddar cheese and mozzarella and stir until melted into sauce.
-
Lastly, add tuna and baked zucchini spirals into cheese sauce. Gently fold ingredients until well combined.
-
Spray medium baking dish with nonstick cooking spray. Transfer zucchini tuna mixture into dish.
-
In a small pan over medium-high heat, cook bread crumbs and 1 Tbsp. extra virgin olive oil until golden brown.
-
Sprinkle bread crumbs over medium-high heat and bake casserole 20-25 minutes.
-
Let cool 10-15 minutes before serving.
-
Garnish with fresh parsley and lemon slices.
Nutrition Facts
Tuna Zucchini Casserole
Amount Per Serving (1 g)
Calories 263
Calories from Fat 126
% Daily Value*
Fat 14g22%
Saturated Fat 5g25%
Polyunsaturated Fat 2g
Monounsaturated Fat 6g
Cholesterol 32mg11%
Sodium 591mg25%
Potassium 766mg22%
Carbohydrates 19g6%
Fiber 3g12%
Sugar 6g7%
Protein 17g34%
Vitamin A 545IU11%
Vitamin C 31mg38%
Calcium 252mg25%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.