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Cheesy Vegan Tuna Casserole

  • Author: Brand New Vegan
  • Prep Time: 30 min
  • Cook Time: 30 min
  • Total Time: 1 hour
  • Yield: 6 servings 1x
  • Category: Casserole
  • Method: Blender, Oven
  • Cuisine: America
  • Diet: Vegan


You asked for it - and here it is. The ultimate comfort food made plant-based. Vegan Tuna Casserole. No nuts, no tofu, no oil, and gluten-free. Just for you.


  • 12 oz brown rice fusilli pasta
  • 15 oz can artichoke hearts (in water)
  • 1/2 yellow onion
  • 2 ribs celery
  • 2 tsp minced garlic
  • 1 cup frozen peas
  • 1/2 cup panko bread crumbs (optional)


  • 3 yukon gold potatoes, cut into quarters (about 400g)
  • 1 cup riced cauliflower
  • 1/2 carrot (about 65 grams)
  • 2 cups water (to steam the potatoes)
  • 1 cup unsweetened almond milk
  • 1/4 cup nutritional yeast
  • 2 Tbs lemon juice
  • 2 Tbs dulse flakes
  • 1 tsp old bay seasonsing
  • 1/2 tsp onion powder
  • 1/2 tsp garlic powder
  • 1/4 tsp salt (if needed)


  1. To prepare the sauce in an Instant Pot, add the potatoes, carrot, cauliflower, and water and set to manual for 7 min with a 10 min natural release. 
  2. If you do not have an instant pot - simply steam them on the stove until they are very soft and a fork can be inserted easily.
  3. Drain and add to blender along with all the remaining sauce ingredients.  (not the 2 cups of cooking water!) Blend until smooth and creamy.  Set aside.
  4. Chop onion and celery and saute in a larke skillet using 1-2 Tbs water or veg broth until softened. 
  5. Drain and rinse artichokes and chop coursely.  Add to skillet along with minced garlic and stir.
  6. Cook 1-2 minutes or until most of the liquid has evaporated. 
  7. Add blender sauce to skillet and mix well.  
  8. Cook pasta according to package instructions.  Add peas to water just before the pasta is finished. 
  9. Drain and add to skillet. 
  10. Mix thoroughly and serve if gluten-free.  
  11. Alternatively, pour into a casserole dish and top with optional panko bread crumbs.  Bake at 375° F for 15-20 minutes ot until top has browned.

Keywords: vegan tuna casserole