Print

Low Carb Cheesy Tuna Casserole

Close-up of a low carb cheesy tuna casserole with melted cheese and herbs

A delicious and comforting low carb cheesy tuna casserole that’s perfect for a quick and healthy dinner. Packed with protein and creamy cheese, this casserole is both satisfying and easy to make.

Ingredients

Scale

2 tablespoons olive oil
1 small yellow onion, finely chopped
2 cloves garlic, minced
12 ounces cauliflower florets, chopped into small pieces
1 cup shredded sharp cheddar cheese
1/2 cup shredded mozzarella cheese
1/2 cup grated Parmesan cheese
1/2 cup sour cream
1/2 cup mayonnaise
1/2 cup heavy cream
2 cans (5 ounces each) tuna in water, drained
1 teaspoon Dijon mustard
1/2 teaspoon salt
1/4 teaspoon black pepper
1/4 teaspoon smoked paprika
1/4 cup chopped fresh parsley

Instructions

Preheat the oven to 375°F (190°C).
Heat olive oil in a large skillet over medium heat. Add the chopped onion and cook for 3-4 minutes until softened.
Add the minced garlic to the skillet and cook for another 1 minute until fragrant.
Add the chopped cauliflower florets to the skillet and cook for 5-7 minutes until tender but still slightly firm. Remove from heat.
In a large mixing bowl, combine the sour cream, mayonnaise, heavy cream, Dijon mustard, salt, black pepper, and smoked paprika. Mix well.
Add the cooked cauliflower mixture to the bowl along with the drained tuna, shredded cheddar cheese, shredded mozzarella cheese, grated Parmesan cheese, and chopped parsley. Stir until all ingredients are evenly combined.
Transfer the mixture into a greased 8×8 inch baking dish and spread evenly.
Bake in the preheated oven for 20-25 minutes until the casserole is bubbly and the cheese on top is melted and golden.
Remove from the oven and let cool for 5 minutes before serving.