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Keto Tuna Casserole

This delicious and filling keto tuna casserole has no noodles, but it has plenty of flavor! Ready in just 30 minutes and made with simple everyday ingredients, this easy recipe is perfect for a weeknight dinner.

Prep Time
15 mins
Cook Time
15 mins
Total Time
30 mins
Servings: 2 servings
Calories: 465 kcal
Course: Main Course
Cuisine: American

Ingredients

  • 2 5-ounce cans tuna in water drained and flaked
  • ⅓ cup mayonnaise
  • 1 tablespoon Dijon mustard
  • ½ cup gruyere cheese shredded, divided
  • ¼ cup red onion minced
  • ¼ teaspoon sea salt
  • ¼ teaspoon black pepper
  • ¼ teaspoon cayenne pepper
  • ¼ cup parsley chopped, for garnish

Instructions

    Cup of Yum
  1. Preheat the oven to 400°F.
  2. In a medium bowl, mix together the tuna, mayonnaise, mustard, ¼ cup of cheese, onion, salt, pepper, and cayenne.
  3. Transfer the mixture to a small, 1-quart casserole dish. Sprinkle the remaining ¼ cup of shredded cheese on top.
  4. Bake the casserole until hot, for about 15 minutes. Remove it from the oven and sprinkle it with parsley for garnish.
  5. Serve immediately, with cut-up veggies and/or pork rinds for scooping out.

Notes

  • You can bulk this casserole up by adding 2 cups of cooked riced cauliflower, increasing the mayonnaise to ½ cup, and dividing it into three servings.
  • You can use tuna in olive oil instead of tuna in water. 
  • The leftovers keep well in the fridge for 3-4 days, or you can freeze them for up to three months if you want to keep them for longer. Reheat them in a 350°F oven or in the microwave (covered) at 50% power.

Nutrition Information

Serving 0.5casserole Calories 465kcal (23%) Carbohydrates 2g (1%) Protein 33g (66%) Fat 36g (55%) Saturated Fat 10g (50%) Sodium 882mg (37%) Sugar 5g (10%)

Nutrition Facts

Serving: 2servings

Amount Per Serving

Calories 465

% Daily Value*

Serving 0.5casserole
Calories 465kcal 23%
Carbohydrates 2g 1%
Protein 33g 66%
Fat 36g 55%
Saturated Fat 10g 50%
Sodium 882mg 37%
Sugar 5g 10%

* Percent Daily Values are based on a 2,000 calorie diet.