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A close-up view of a delicious portion of high protein tuna casserole on a light wood board.

High Protein Tuna Casserole – Ready in 30 Minutes!

This high-protein tuna casserole is a quick, creamy, and satisfying dish perfect for a wholesome meal in just 30 minutes.
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Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings: 4 servings
Course: Main Course
Cuisine: American
Calories: 550
Ingredients Method Notes

Ingredients
  

Canned Tuna
  • 8 oz high-protein pasta e.g., Kaizen!
  • 1 cup low-fat cottage cheese
  • ½ cup plain nonfat Greek yogurt
  • ½ cup low-sodium vegetable or chicken broth
  • 1 tablespoon cornstarch
  • ¼ cup reduced-fat shredded cheddar
  • ¼ cup light mozzarella
  • 6 oz sautéed mushrooms, finely chopped fresh or frozen
  • 1 small onion, diced
  • 1 stalk celery, finely chopped
  • 1 cup frozen peas
  • ½ teaspoon garlic powder
  • ½ teaspoon onion powder
  • ½ teaspoon salt adjust to taste
  • ¼ teaspoon black pepper
  • 1 teaspoon Dijon mustard
  • ½ cup Optional: Condensed cream of mushroom soup optional
  • ¼ cup grated Parmesan cheese
  • ¼ cup shredded cheddar
  • ¼ cup shredded mozzarella
  • Light mist of olive oil spray

Method
 

  1. Preheat oven to 375°F and grease a 9x13 dish.
  2. Cook pasta until al dente, then drain and set aside.
  3. Sauté onion, celery, and mushrooms until softened, about 5 minutes.
  4. Blend cottage cheese, Greek yogurt, broth, cornstarch, spices, and optional soup until smooth.
  5. Mix peas, blended sauce, pasta, tuna, and cheeses; transfer to dish, top with remaining cheese and panko, then spray with olive oil.
  6. Bake for 25-30 minutes until bubbly and golden. Rest 5-10 minutes before serving.

Notes

For extra crunch, broil for 1-2 minutes at the end of baking.