Tuna Noodle Casserole

Finished tuna noodle casserole on a blue backdrop with a napkin to the side. Crispy topping and fresh parsley sprinkled on top.

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4.29 from 28 votes

Gluten-Free Tuna Noodle Casserole Recipe with no milk or cream. Healthy and satisfying!

Prep Time10

Cook Time1

Total Time1 10

Course: Main Dishes

Cuisine: American

Servings: to 8 servings

Calories: 597kcal

Author: Julia

Ingredients

12 ounces gluten-free noodles
1 Tbsp avocado oil
1 small yellow onion finely chopped
10 ounces baby bella mushrooms sliced
3 cloves garlic minced
2 tsp Italian seasoning
1 3/4 cups chicken broth low-sodium recommended
1 cup full-fat canned coconut milk
3 Tbsp gluten-free all-purpose flour
2 Tbsp rice vinegar or cider vinegar or 1/4 cup white wine
3/4 tsp sea salt to taste
1 cup peas canned or frozen
3 5-oz cans tuna in olive oil, undrained
1 cup grated cheddar cheese or more to taste*

Optional Topping:

1/2 cup super fine almond flour
2 Tbsp avocado oil

Instructions

Cook the noodles according to package instructions (I used brown rice pasta noodles and the directions said to cook for 12 minutes - I cooked for 10 to leave the noodles al dente).
While the pasta is cooking, prepare the sauce. In a large skillet, heat the avocado oil over medium-high heat. Add the onion and sauté, stirring occasionally, until onion begins to brown, about 8 minutes. Add the mushrooms and garlic and continue sautéing another 2 minutes.
Add the Italian seasoning, chicken broth, coconut milk, and rice vinegar and bring to a full boil. Add the flour and whisk well until all of the clumps are out. Continue cooking at a boil, whisking occasionally, until sauce is very thick. Add the sea salt, peas, tuna, and cheese and stir well.
Preheat the oven to 375 degrees F.
Transfer the noodles to a large (13” x 9”) casserole dish, followed by the creamy sauce. Stir everything together until well incorporated.
In a small bowl, stir together the almond flour and avocado oil. Sprinkle this mixture over the casserole and bake for 20 to 30 minutes, until casserole is bubbling.
Serve and enjoy!

Video

Notes

*substitute cheddar cheese for any type of grated cheese you love. Mozzarella, jack cheese, colby jack cheese, gruyere, and gouda are all great options. Make the recipe dairy-free by using dairy-free cheese or skipping the cheese altogether. I find I prefer the casserole without vegan cheese when making it dairy-free.

Nutrition