Gluten-Free Dairy-Free Tuna Casserole

Total Time
1hr 5mins
Prep 35 mins
Cook 30 mins

So tasty, like it has cheese sauce or dairy. I serve this with a salad on the side. This is a personal recipe I created.

Ingredients Nutrition

  • 3 12 cups brown rice pasta (or other wheat free pasta, fusilli shape, cooked to aldente, other shapes may be used like penne)
  • 4 12 tablespoons olive oil
  • 12 cup chopped onion
  • 1 cup sliced mushrooms
  • 12 cup frozen peas, rinsed of ice (optional)
  • 14 cup rice flour (to be gluten free)
  • 2 cups chicken broth (or more if needed)
  • 14 cup helmans olive oil mayonnaise (to be soy free)
  • salt
  • pepper
  • 2 (6 ounce) cans tuna in water (in water not veg broth to be soy free)
  • 34 cup bread, torn into crumbs (optional, wheat free bread only from health food stores)
  • paprika (not the hot kind)


  1. Preheat oven to 350°F.
  2. Grease a shallow baking dish I use 9" x 13".
  3. Heat 2 tablespoons olive oil in a pan over medium heat, add onion & sliced mushrooms, cook until tender then remove from pan.
  4. Add 2 more tablespoons olive oil to pan and stir in flour whisking until smooth and frothy.
  5. Gradually add broth until it forms a sauce consistency.
  6. Then stir in the mayonnaise, salt and pepper. Stir until mixture is smooth.
  7. Mix in drained tuna, mushroom, onions & thawed peas if using.
  8. Spread pasta in baking dish and pour sauce to cover. (Will get dry pieces if some are left uncovered).
  9. Tear bread into crumbs and sprinkle on top if using sift paprika over entire pan to give a lovely colour and drizzle the additional olive oil.
  10. Bake in the preheated oven for 30 minutes until slightly browned on top.
Most Helpful

5 5

This was delicious! I can't have dairy, so this was excellent! It felt good to make tuna casserole from scratch. I usually make the tuna My husband I don't like mushrooms, so I substituted a cup of celery. I will definitely make this again.

5 5

Yum!! My husband is very picky when it comes to gluten-free dishes and he loved this. He got thirds! I did make two substitutions to accommodate my daughter's food allergies (egg, wheat, and dairy). I used Quinoa pasta and substitute the mayonnaise with Grapeseed oil Veganiase.

5 5

This recipe is amazing! I have actually used the sauce to make a GFDF Tator Tot casserole as well, and it was so good my family requested it two nights in a row. Thank you for giving this GFDF girl some real comfort food!