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Tuna Rice Casserole
4.7 from 225 votes

Tuna Rice Casserole

Tuna Rice Casserole combines cooked white rice, canned tuna, and a moist cheese sauce made with almond milk, eggs, mayonnaise, and stone ground mustard. This dish features a creamy, cheesy texture with a golden-brown cheese topping formed by baking the casserole until the center reaches a safe temperature. The tuna adds protein, while the cheese and sauce bind the rice together for a comforting casserole suitable for a casual family meal.

Prep Time
20 mins
Cook Time
20 mins
Total Time
40 mins
Servings: 6 servings
Calories: 412 kcal
Course: Main Course
Cuisine: American

Ingredients

  • 2 cups white rice uncooked
  • 1 2/3 cups almond milk unsweetened
  • 2 large egg
  • 3 Tbsp mayonnaise made with avocado oil
  • 2 Tbsp mustard stone ground
  • 3 (6-oz) cans tuna drained
  • 3 cups mozzarella cheese divided***

Instructions

    Cup of Yum
  1. Cook rice according to package instructions. Set rice aside to cool while you’re prepping the rest of the recipe.
  2. Preheat the oven to 400 degrees F.
  3. In a large mixing bowl, whisk together the almond milk, eggs, mayonnaise (or butter), sea salt, stone ground mustard, and 2 cups of the mozzarella cheese to a mixing bowl (you’ll use the remaining 1 cup of cheese for the topping). Whisk this mixture together until it is well-combined. Add the drained tuna and rice and mix well to combine. 
  4. Transfer to a mixing bowl to a casserole dish (I use an 9” x 9” square casserole dish). 
  5. Top the casserole with the remaining cheese (add more if desired!) and place on the center rack of the preheated oven. Bake for 20-30 minutes, or until the cheese is melted and begins turning golden-brown and the center of the casserole reaches 160 degrees Fahrenheit. To check the internal temperature of the casserole, insert a meat thermometer into the center and wait until the numbers stop moving. Allow casserole to cool 5 to 10 minutes before serving.

Notes

  • Alternative milks like cow's, oat, canned coconut, rice, or cashew milk can be used in place of almond milk.
  • Mayo can be substituted with melted butter, ghee, or avocado oil for fat content.
  • Other melting cheeses such as jack, Gruyere, or Gouda may replace mozzarella for different flavors.
  • Using cold leftover rice may increase baking time to 30-35 minutes for thorough heating.

Nutrition Information

Serving 1of 6 Calories 412kcal (21%) Carbohydrates 32g (11%) Protein 33g (66%) Fat 17g (26%) Fiber 1g (4%)

Nutrition Facts

Serving: 6 servings

Amount Per Serving

Calories 412

% Daily Value*

Serving 1of 6
Calories 412kcal 21%
Carbohydrates 32g 11%
Protein 33g 66%
Fat 17g 26%
Fiber 1g 4%

* Percent Daily Values are based on a 2,000 calorie diet.