Keto Tuna Casserole with Salty Bacon & Cheese

Keto Tuna Casserole with Salty Bacon & Cheese

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Mad Creations Keto Tuna Casserole with Salty Bacon Crust, is an inexpensive and timeless family favourite that everyone can still enjoy while following a Ketogenic Diet.

This recipe is featured in my extremely popular limited edition book #ketobudget 

A tuna mornay was added to a vote of popular recipes to create in a budget style for the family.  Tuna Casserole came out as a huge winner, and even more so when it was again voted as my first FREE recipe to featured out of the book.  Plus it is easily the most commented and recommended recipe by everyone that has made it to date.  It seems tuna hating kids and hubbies absolutely love it and vote with licking their plates clean.  I guess that means this tuna mornay is pretty good.

Tuna Casserole is such an easy recipes, and even with this one, it is easy to change it up to your personal taste.  If don’t eat mushrooms, swap it out for celery or broccoli.  If you don’t eat tuna, swap it out for chicken, bacon or ham.  If you want more vegetable throw them in there, and if you are like me and need a bit of heat add some chillies and lots of cracked pepper.   No matter how you want it this recipe is ludicrously simple.  So enjoy.

If you love this recipe please comment below let other know how you got on with it!

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Mad Creations Ketogenic Diet Tuna Mornay Casserole


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Mad Creations Keto Tuna Mornay with Crispy Bacon & Cheese

Keto Tuna Casserole with Salty Bacon

A dish that will convert any tuna hater!
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
Course: Dinner
Cuisine: Keto
Keyword: keto tuna casserole
Recipe Category: Low Carb
Servings: 4 serves
Calories: 476kcal
Author: Megan Ellam


  • 15 g butter
  • 15 g olive oil
  • 100 g mushrooms sliced
  • 4 green spring onions chopped
  • 1 tbsp parsley chopped
  • 1/2 tsp xanthan gum (opt. substitutes include psyllium husks, or extra veg, like broccoli, cauliflower)
  • 220 g thickened cream
  • 100 g mozzarella cheese
  • 400 g tinned tuna in springwater
  • salt and pepper to taste
  • 2 bacon rashers diced and cooked in oven until crispy
  • cheese cooked until crispy and crumbled place grated cheese on baking tray and cook in hot oven until melted and golden, remove from oven and leave to cool on tray
  • 200 g zucchini zoodles or cauliflower rice, or konjak noodles


  • Preheat oven to 170℃.
  • TM – Heat butter and oil 1 minute/80℃/speed 2. Add mushrooms and onion and cook 4 minutes/Varoma/reverse soft.  Add xanthan, cream and 80g cheese and heat 2 minutes/90℃/reverse stir. Combine drained tuna, salt and pepper to mixture, 20 seconds/reverse speed 2.
  • Place mixture in a medium sized casserole dish and cook for 15 minutes.  Top with extra grated mozzarella and cook for further 5 minutes until cheese is melted and slightly golden.  Sprinkle over crispy bacon and crumbled cheese crisps.  Season to taste. Serve with zoodles, and fresh green salad.
  • CV – Melt butter and oil to saucepan over medium heat, add onions and mushrooms and saute until soft. Add xanthan (or psyllium) and stir until makes it start to make a roux, and cream and 80g cheese and keep stirring as it thickens.  Combine drained tuna, spring onions salt and pepper to mix. Place mixture in a medium sized casserole dish and cook for 15 minutes.  Top with extra grated mozzarella and cook for further 5 minutes until cheese is melted and slightly golden.  Sprinkle over crispy bacon and crumbled cheese crisps.  Season to taste. Serve with zoodles, and fresh green salad.
  • If you loved this recipe or had any different serving suggestions please comment below so that others know it is a recipe worth baking. xox


The average net carbs per serve is approximately 5 grams.
Thi dish can be ahead and either kept in the fridge for up to 3 days or frozen in individual serves.


Serving: 1serve | Calories: 476kcal | Carbohydrates: 5g | Protein: 29g | Fat: 38g | Saturated Fat: 20g | Cholesterol: 146mg | Sodium: 542mg | Potassium: 504mg | Fiber: 1g | Sugar: 2g | Vitamin A: 1430IU | Vitamin C: 13.4mg | Calcium: 196mg | Iron: 2.3mg | Net Carbs: 4g
Tried this recipe?Mention @meganellam or tag #madcreations!


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This Post Has 9 Comments

  1. Bowls licked clean, and asked to make again….Success!

  2. This is probably a favourite recipe in the Keto cookbook with my family. It is made almost weekly .. even my fish hating daughter devours this meal .. thanks Megan for giving me a recipe we can all eat and enjoy x

  3. We loved this. Had great flavour. Will be making again

  4. Best recipe absolutely love it. My dad who hated tuna even eats it.

  5. Tuna Mornay reigning in from the 80’s and 90’s – this is delicious – i didn’t have mushrooms or spring onions so subbed with capsicum and brown onion and sautéed for a bit longer. Winner in our house ever with non Mr. LCHF! Loved the bacon and cheese topping!

  6. This is my all time favourite!! Weekly staple!! Plus sooo easy to make!! Highly recommend for everyone to try!! 🙂 <3

  7. Unfortunately not a winner with my family – hubby & I liked it but the kids – no way 🙁

  8. I have made this dish a couple of times now. We love how quick and easy it is. I changed the tuna for white fish ( barramundi) and added some green prawns chopped into pieces. I took the skin off the fish and crisped it up and and added on top of dish when it was out of the oven. Served it with zoodles and salad.
    The second variation was cooking the fish pieces and using the mornay sauce as a topper and served with a green salad. Either way delicious and will be making again. It’s a great recipe .

  9. Yummy will be doing this one

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