This gluten-free tuna mornay is one of my childhood favorite dishes, It’s very simple and tastes absolutely amazing.

Gluten-Free Tuna Mornay

If you need to feed a crowd, then this mornay also goes well with some white rice or even some pasta. Personally,  I  prefer it just by itself without any extras. If you do cook something like pasta up, then I simply recommend cooking while it the mornay is baking in the oven. Simply serve the pasta with the mornay over the top.

The dollops of the fruit chutney just add explosions of flavor to this dish. You will be amazed on just how well it works with the overall meal without being too overpowering. The crunchy cheesy topping adds that much-needed crunch that so many mornay’s are missing.

Tuna Mornay

If you want to add more vegetables to this mornay, then something like mushrooms or even celery would both work pretty well. If you’re going to add either of these, I recommend adding them at the same time as the onion.

If you want to see how this gluten-free dinner recipe is done, then be sure to check out the video I have prepared below. It goes through all the steps to making this delicious tuna mornay.

Gluten-Free Tuna Mornay Recipe

Prep time
15 Minutes
Cook time
30 Minutes
Total time
45 Minutes


  • 3 Tbsp butter
  • 1 onion, diced
  • 1 tsp garlic, crushed
  • 3 Tbsp gluten-free cornstarch
  • 2 cups milk
  • 1 tsp Dijon mustard
  • 425g (15 oz) can tuna, drained
  • 310g (11 oz) can corn kernels, drained
  • 1 Tbsp lemon juice
  • 1 cup grated cheese
  • 2 Tbsp fruit chutney


  • 1 cup gluten-free cornflakes, slightly crushed
  • 2 Tbsp parmesan cheese
  • 2 Tbsp melted butter


  1. Preheat an oven to 180°C (350°F)
  2. In a pan over medium heat, melt the butter.
  3. Add the onion, garlic and cook until onion is translucent.
  4. Add the cornstarch and a pinch of salt & pepper. Cook for 2-3 minutes.
  5. Lower the heat, add the milk and mustard.
  6. Bring to a simmer and stir constantly until thickened.
  7. Stir in the tuna, corn, lemon juice and cheese.
  8. Place in a greased ovenproof casserole dish.
  9. Prepare the topping by mixing the melted butter, corn flakes and Parmesan cheese.
  10. Dollop the fruit chutney across the top of the mornay. Lastly, sprinkle the topping over the top.
  11. Place into the preheated oven and cook until the topping is lightly browned. Roughly 15 minutes.
  12. Serve & Enjoy

Cooking Tips

  • If you find the sauce has thickened up too much, then you can simply mix in some more milk. However, you may find the mornay will become runny after baking in the oven.
  • The topping is optional but does add an extra level to the dish, and I would recommend doing it. You can also skip the baking if you don’t add the topping.
  • You can use either fresh or dried Parmesan for the topping.
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Nutritional Information

If you’re curious about how much of an impact this delicious tuna mornay might have on your diet, then you can find all the nutritional information you need below.

Keep in mind this data may differ slightly depending on the ingredients/brands you end up using. It should be accurate enough to give you a good idea of what to expect from eating this delicious dish.

Nutrition Facts
Serving Size: 575g (20.28 oz)
Servings Per Recipe: 6
Amount Per Serving
Calories 466 Calories from Fat 227.7
% Daily Value*
Total Fat 25.3g 39%
Saturated Fat 13.1g 66%
Trans Fat 0g
Cholesterol 77mg 26%
Sodium 362mg 15%
Total Carbohydrate 30.9g 10%
Dietary Fiber 2.9g 12%
Sugars 7.7g
Protein 31.1g 62%
*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

I hope that you love this gluten-free tuna mornay recipe as much as I do. If you have any feedback or have a variation that you would love to share then please don’t hesitate to leave a comment below.