Keto Tuna Mornay
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4.38 from 8 votes

Keto Tuna Mornay - A Low Carb "Cheesy & Creamy" One Pan Casserole

Our creamy, cheesy Keto Tuna Mornay is a great budget-friendly meal that the whole family will love. The leftovers make a delicious lunch!
Prep Time20 mins
Cook Time20 mins
Total Time40 mins
Course: Dinner, Main Course
Cuisine: American
Servings: 4 servings
Calories: 510kcal
Author: Gerri



  • Preheat your oven to 180C/355F.
  • Place a medium-sized saucepan over high heat and add the butter, onions, and celery. Saute for 5-7 minutes then add the mushrooms.
  • Cook the mushrooms for 5 minutes then add the cream cheese, cream, and almond milk and bring to a simmer. 
  • Once the cream cheese has melted stir through the mozzarella cheese and remove the pan from the heat.
  • Mix through the drained tuna, salt, and pepper.
  • Spoon the cream tuna mixture into a casserole dish and top with the cheddar cheese, torn Keto Bread, and dried parsley.
  • Bake for 15-20 minutes until the cheese has melted and the bread is browned and crunchy.
  • Serve straight away as is or with a side of Cauliflower Rice.


Calories: 510kcal | Carbohydrates: 7g | Protein: 36g | Fat: 36g | Saturated Fat: 19g | Polyunsaturated Fat: 0g | Monounsaturated Fat: 0g | Trans Fat: 0g | Cholesterol: 170mg | Sodium: 1059mg | Potassium: 577mg | Fiber: 2g | Sugar: 3g | Vitamin A: 1065IU | Vitamin C: 3mg | Calcium: 211mg | Iron: 1.5mg