Go Back
–+ servings
Keto Tuna Casserole

Creamy Keto Tuna Casserole for Comfort Food Lovers

This Keto Tuna Casserole is a low-carb delight that transforms albacore tuna into a family-friendly dish full of comforting flavors.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 6 servings
Course: Dinner
Cuisine: American
Calories: 450
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Base
  • 2 tablespoons Olive Oil Used for sautéing vegetables.
  • 1 tablespoon Butter Adds richness; can substitute with olive oil.
  • 1 cup Onion Diced; yellow or sweet onions work beautifully.
  • 1 cup Celery Chopped; can be omitted if desired.
  • 2 cloves Garlic Minced; use fresh for the best flavor.
For the Casserole
  • 1 teaspoon Sea Salt Adjust according to dietary needs.
  • 0.5 teaspoon Black Pepper Substitute with white pepper if desired.
  • 1 cup Cabbage Chopped; can substitute with zucchini or cauliflower.
  • 2 teaspoons Dill Fresh preferred; dried works in a pinch.
  • 1 teaspoon Mustard Powder Substitute with Dijon mustard if desired.
  • 1 each Lemon Zest & Juice Use fresh lemons for best results.
For the Creamy Topping
  • 1 cup Heavy Cream Can use coconut cream as a dairy-free alternative.
  • 1 cup Parmesan Cheese Grated; mozzarella or nutritional yeast can be used.
For the Protein & Extras
  • 2 cans Canned Albacore Tuna Drained; any canned tuna works.
  • 1 cup Peas Frozen; can substitute with other low-carb veggies.

Equipment

  • Extra-large ovenproof skillet

Method
 

Step-by-Step Instructions
  1. Heat the Base: In an extra-large ovenproof skillet, combine 2 tablespoons of olive oil and 1 tablespoon of butter over medium heat. Allow the butter to melt and sizzle gently for about 1 minute.
  2. Sauté the Vegetables: Add 1 cup of chopped cabbage, 1 diced onion, 1 cup of chopped celery, and 2 minced garlic cloves to the skillet. Sprinkle with 1 teaspoon of sea salt and ½ teaspoon of black pepper. Sauté for 8 to 10 minutes.
  3. Mix in Seasonings: In a separate bowl, whisk together 2 teaspoons of dill, 1 teaspoon of mustard powder, the zest of 1 lemon, and the juice from half of the lemon. Stir this mixture into the skillet and cook for 2 minutes.
  4. Create the Creamy Sauce: Pour in 1 cup of heavy cream and 1 cup of grated Parmesan cheese. Stir for about 3 minutes until the cheese melts and a creamy sauce forms.
  5. Thicken the Sauce: Reduce heat to medium-low and let the sauce simmer for about 5 minutes, stirring occasionally.
  6. Add the Tuna and Peas: Gently fold in 2 cans of drained albacore tuna and 1 cup of frozen peas. Cook for another 2 to 3 minutes.
  7. Prepare for Baking: Preheat your broiler to high. Transfer the mixture into a baking dish and sprinkle with ½ cup of Parmesan cheese.
  8. Broil to Perfection: Place under the broiler for 3 to 5 minutes until golden brown and bubbly.

Nutrition

Serving: 1servingCalories: 450kcalCarbohydrates: 10gProtein: 30gFat: 34gSaturated Fat: 19gPolyunsaturated Fat: 2gMonounsaturated Fat: 8gCholesterol: 80mgSodium: 800mgPotassium: 500mgFiber: 3gSugar: 2gVitamin A: 800IUVitamin C: 10mgCalcium: 300mgIron: 3mg

Notes

Store leftovers in an airtight container in the fridge for up to 3 days or freeze for up to 2 months. Reheat in the oven for best texture.

Tried this recipe?

Let us know how it was!