Keto Tuna Mornay – “Cheesy & Creamy” Low-Carb Casserole

Keto Tuna Mornay
Keto Tuna Mornay

Our creamy, cheesy Keto Tuna Mornay is a great budget-friendly meal that the whole family will love and the leftovers make a delicious low-carb lunch!

This Keto Tuna Mornay recipe can be made ahead and baked when needed, just pause the recipe at step 6 and store in the fridge, then bake for an additional 10 to 15 minutes when needed.

This low carb tuna casserole recipe makes 4 serves.

ketone meters reviews

Store the tuna casserole in the fridge for up to 4 days, or freeze for up to 3 months.

Keto Tuna Mornay Ingredients

Keto Tuna Mornay Ingredients
Keto Tuna Mornay Ingredients
  • 2 ounces of Butter
  • 1 small Onion, diced
  • 2 stick of Celery, diced
  • 7 ounces of Mushrooms, diced
  • 2 ounce of Cream Cheese
  • ¼ cup of Heavy Cream
  • ¼ cup of Unsweetened Almond Milk
  • ½ cup of Mozzarella Cheese, shredded
  • 3 x 5-ounce tins of Tuna in Water, drained well
  • ½ teaspoon of Salt
  • ¼ teaspoon of Pepper, ground
  • ⅓ cup of Cheddar Cheese, shredded
  • 1 Keto Burger Roll or 1-2 slices of Keto Bread, torn
  • 1 teaspoon of Dried Parsley

How to Make Keto Tuna Mornay

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

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!
5 from 2 votes
Print Pin Rate
Course: Dinner, Main Course
Cuisine: American
Prep Time: 20 minutes
Cook Time: 20 minutes
Total Time: 40 minutes
Servings: 4 servings
Calories: 510kcal
Author: Gerri

Ingredients

  • 2 ounces butter
  • 1 small onion diced
  • 2 sticks celery diced
  • 7 ounces mushrooms diced
  • 2 ounces cream cheese
  • 1/4 cup heavy cream
  • 1/4 cup unsweetened almond milk
  • 1/2 cup mozzarella cheese shredded
  • 3 5 ounce Tuna in Water well drained
  • 1/2 teaspoon salt
  • 1/4 teaspoon pepper ground
  • 1/3 cup cheddar cheese shredded
  • 1 Keto Burger Bun
  • 1 teaspoon dried parsley

Instructions

  • 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.

Nutrition

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: 21.3% | Vitamin C: 3.6% | Calcium: 21.1% | Iron: 8.1%
Keto Tuna Casserole
Keto Tuna Casserole

If you enjoy this Keto Tuna Mornay and other one pan style meals? Why not try some of our other low-carb casserole recipes

To make a larger batch of this Keto Tuna Mornay recipe adjust the servings above.

keto supplements

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

my keto kitchen

Get FREE Recipes Delivered

Join our mailing list to receive our latest Recipes to your inbox.

You have Successfully Subscribed!

Pin It on Pinterest