Creamy High-Protein Tuna Casserole with Easy Greek Yogurt Sauce

Warm and Familiar Comfort Food

As I stood in my kitchen, the comforting aroma of sautéed onions and garlic filled the air, reminding me of family gatherings and hearty meals shared with loved ones. There’s something about a creamy tuna casserole that warms the heart and satisfies the soul. This dish is not just quick to prepare, but it also packs a punch with high protein thanks to the tuna and Greek yogurt. It’s a recipe that matters to me because it brings back memories of cozy evenings. You can enjoy it during a busy weeknight or serve it to friends on the weekend. What makes this casserole special is its creamy texture and the added nutrition of peas, making it a wholesome meal for everyone.

Why Make This Recipe

You might wonder why this creamy high-protein tuna casserole is a good choice. First, it’s incredibly easy to make, taking just a little time to prepare. Secondly, it’s a delicious way to incorporate protein into your diet, thanks to the tuna and Greek yogurt. This recipe is also flexible; you can use any type of pasta you have on hand and adjust the ingredients to fit your taste. Plus, it’s a great way to use pantry staples. With just a few simple ingredients, you’ll have a delightful dish that the whole family will love.

How to Make Creamy High-Protein Tuna Casserole

Ingredients

  • 8 oz pasta (any type, cooked to al dente)
  • 1 tbsp olive oil (for sautéing)
  • 1 onion (chopped)
  • 2 cloves garlic (minced)
  • 1 cup Greek yogurt (plain, for sauce)
  • 1 tbsp mustard (any variety)
  • 2 cups shredded cheese (divided)
  • 1 can tuna (drained)
  • 1 cup frozen peas (for added nutrition)
  • breadcrumbs (optional, tossed with olive oil for topping)

Directions

  1. Bring a large pot of salted water to a rolling boil. Add the pasta and cook until al dente, about 8-10 minutes. Drain and set aside, keeping ½ cup of pasta water for later.
  2. Heat olive oil in a skillet over medium heat. Add chopped onion and cook until translucent and soft, about 4 minutes. Stir in minced garlic and sauté for another minute until fragrant.
  3. In a large bowl, combine the sautéed onion and garlic with Greek yogurt and mustard. Whisk until smooth, adjusting with reserved pasta water if the sauce feels too thick.
  4. Gently mix in the drained tuna, cooked pasta, and frozen peas. Be careful not to break the tuna while combining.
  5. Pour the mixture into a greased baking dish. Top with shredded cheese, and if desired, toss breadcrumbs with olive oil and sprinkle on top for added crunch.
  6. Preheat your oven to 375°F (190°C). Bake the casserole uncovered for 20-25 minutes, until the cheese is melted, bubbly, and delightfully golden brown. Allow it to rest for 5 minutes before serving.

How to Serve Creamy High-Protein Tuna Casserole

This casserole is best served warm right out of the oven. You can enjoy it as a main dish or pair it with a simple green salad for a balanced meal. Leftovers are just as delicious, making it a fantastic option for lunch the next day.

How to Store Creamy High-Protein Tuna Casserole

To store leftovers, let the casserole cool completely. Transfer it to an airtight container and store it in the refrigerator for up to 3 days. You can also freeze portions for later. Simply cover tightly with foil or plastic wrap before freezing. When you’re ready to enjoy it again, thaw it in the fridge overnight and reheat in the oven until warmed through.

Tips to Make Creamy High-Protein Tuna Casserole

  • For extra flavor, add some herbs like dill or parsley to the sauce before mixing in the pasta.
  • You can use any type of cheese you prefer or have on hand; cheddar and mozzarella work great.
  • If you want more veggies, consider adding bell peppers, corn, or broccoli.

Variation

Feel free to switch up the protein! You can substitute the tuna with cooked chicken or chickpeas for a vegetarian option. Additionally, try different mustards or even a splash of hot sauce if you like a little kick in your casserole.

FAQs

Can I use whole wheat pasta?

Yes, whole wheat pasta works well and offers extra fiber while cooking the same way as regular pasta.

Can I prepare this casserole in advance?

Absolutely! You can assemble the casserole a day ahead, store it in the fridge, and bake it just before serving.

Is this casserole healthy?

Yes, it’s packed with protein from the tuna and Greek yogurt, and the peas add extra vitamins and fiber, making it a nutritious choice for any meal.

Creamy high-protein tuna casserole with Greek yogurt sauce in a baking dish.

Creamy High-Protein Tuna Casserole

This creamy tuna casserole is a comforting, high-protein dish featuring pasta, tuna, and Greek yogurt, perfect for busy weeknights or family gatherings.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American
Calories: 350

Ingredients
  

Pasta and Base Ingredients
  • 8 oz pasta (any type, cooked to al dente)
  • 1 tbsp olive oil (for sautéing)
  • 1 onion (chopped)
  • 2 cloves garlic (minced)
Sauce Ingredients
  • 1 cup Greek yogurt (plain, for sauce)
  • 1 tbsp mustard (any variety)
Main Ingredients
  • 2 cups shredded cheese (divided) Use any cheese you prefer
  • 1 can tuna (drained)
  • 1 cup frozen peas (for added nutrition)
  • breadcrumbs (optional, tossed with olive oil for topping)

Method
 

Preparation
  1. Bring a large pot of salted water to a rolling boil. Add the pasta and cook until al dente, about 8-10 minutes. Drain and set aside, keeping ½ cup of pasta water for later.
  2. Heat olive oil in a skillet over medium heat. Add chopped onion and cook until translucent and soft, about 4 minutes. Stir in minced garlic and sauté for another minute until fragrant.
  3. In a large bowl, combine the sautéed onion and garlic with Greek yogurt and mustard. Whisk until smooth, adjusting with reserved pasta water if the sauce feels too thick.
Mixing and Baking
  1. Gently mix in the drained tuna, cooked pasta, and frozen peas. Be careful not to break the tuna while combining.
  2. Pour the mixture into a greased baking dish. Top with shredded cheese, and if desired, toss breadcrumbs with olive oil and sprinkle on top for added crunch.
  3. Preheat your oven to 375°F (190°C). Bake the casserole uncovered for 20-25 minutes, until the cheese is melted, bubbly, and delightfully golden brown.
  4. Allow it to rest for 5 minutes before serving.

Notes

This casserole is best served warm right out of the oven. Leftovers are just as delicious, making it a fantastic option for lunch the next day. For extra flavor, consider adding herbs like dill or parsley. You can also substitute the tuna with cooked chicken or chickpeas for a vegetarian option.

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