This from scratch tuna casserole is comfort in a dish!! You won’t believe how easy it is to make a rich and creamy sauce with no dairy and only clean ingredients! This casserole is especially flexible as it can be adapted for Paleo, keto, AND Whole30 diets!
Comfort food! This gluten free dairy free tuna casserole will satisfy on any cool day! Easily made Paleo, keto, or Whole 30 compliant.
I worked out a recipe for this some months back when I had a plethora of tuna in the pantry to be used. I have tried multiple recipes over the last couple of years and just kept tweaking to find a recipe I liked best.
Gluten free dairy free tuna casserole really CAN taste great without a can of cream of mushroom soup (and if you read the labels on those cans, you’ll be happy to cook from scratch anyways).
- My favorite gluten free noodles are the Tinkiyada brand…no one can ever tell the difference!
- I like to use ghee, which is butter with all the milk solids (aka casein) removed. Any butter or oil will work though!.
- We use Wild Planet Tuna…it is wild caught and canned in small batches and retains its’ Omega 3’s in canning…great stuff!
PERSONALIZE IT/JAZZ IT UP: This is a great basic gluten free dairy free tuna casserole, but there are lots of great ways to change it up:
- Add any variety of vegetables like peas, broccoli, spinach, or cauliflower.
- Add some spicy heat by using red pepper flakes or some cayenne.
- Mayonnaise (my homemade one linked) is a great addition instead of the cheese for some richness.
- A few tablespoons white wine or nutritional yeast would add some different flavor depth to the sauce.
- For the topping you could use crushed up potato chips or some sliced almonds mixed with butter and garlic. Have fun…I know I always do!
- This will work with roasted spaghetti squash as a stand in for the noodle…just add an egg in to help absorb some of the water! Let me know if you try it! A reader did and loved it!
- The almond/ghee/garlic topping works well.
- You could also leave all noodles out (low carb or otherwise) and bake the creamy coated tuna with the garlic topping by itself. Then serve along side some sauteed veggies or cauli rice (This is how I do it for myself!)
- I like to use cassava flour to thicken the creamy sauce since it has such a neutral flavor, but any grain free flour will work.
Gluten Free Dairy Free Tuna Casserole Recipe:
Gluten Free & Dairy Free Tuna Noodle Casserole from Scratch
- 1 1/2 cups dry gluten free noodles I use either Trader Joe's brand or Tinkiyada, or roasted spaghetti squash
- 3 tablespoons allowed butter or ghee or olive oil
- 1 medium onion diced
- 1 sweet bell pepper finely diced
- 2-3 stalks celery finely diced
- 1/4 cup sweet rice flour or any mild tasting flour, this is for thickening only, so coconut flour, cassava, or a starch
- 2 cups unsweetened milk I use So Delicious Unsweetened, this could be part chicken stock.
- 2 teaspoons yellow mustard you can use more if you like extra tang like we do. I sometimes add zest of one lemon here too, it is amazing in this!
- 2 teaspoons Dijon mustard
- 3/4 teaspoons sea salt to taste
- 1/4 cup homemade mayo OR 1 cup grated allowed cheese
- 2 cans albacore tuna I like Wild Planet
- 1 cup gluten free breadcrumbs (I make my own crumbs by whirring old pieces of various gluten free bread in my food processor. OR 3/4 cup almond flour works for a Paleo option!
- 2 tablespoons butter or oil Or ghee OR avocado oil
- 2 cloves minced garlic
Preheat the oven 350 degrees.
In a saucepan, boil noodles until very al dente..remember they will cook further in the casserole a bit. Alternately, roast your spaghetti squash and cool to shred.
Heat a large pan over medium heat.
Add your preferred butter (any oil would work too) to heat gently.
Add the onion, celery, and bell pepper and saute for 5-8 minutes to soften.
Mix in the flour and stir to coat the vegetables evenly.
In a glass measuring cup, mix the milk and mustards and pour into the vegetables, stirring to blend.
Continue to stir until the mixture is thick and turn off the heat.
Add the salt to taste and the mayo or cheese. Stir to blend, taste, and add more mustards, mayo, or salt to your taste.
Stir in the noodles of choice and the tuna and mix to blend.
Pour into a greased 12 x 8 pan.
Topping: Mix together the breadcrumbs or almond flour, melted butter, and minced garlic and sprinkle evenly over the top of the casserole.
Bake in the oven until hot, bubbly, and the topping is crispy.