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+ servings

Tuna Zoodle Casserole

A low carb, Whole30, and paleo version of your favorite childhood classic comfort food!
Course Dinner
Cuisine American
Prep Time 5 minutes
Cook Time 20 minutes
Total Time 25 minutes
Servings 6 people
Calories 245kcal
Author Mary Smith


  • 2 cans tuna I like Wild Planet
  • 20 oz zoodles I used two 10 oz packages of pre-cut zoodles (about 4-5 cups)
  • 8 oz sliced white or cremini mushrooms (about 2 cups)
  • 1 tbsp ghee or olive oil
  • 2 cloves garlic minced
  • 1 cup raw cashews
  • 1 cup chicken broth
  • ½ lemon juiced
  • 1 tsp onion powder
  • ½ tsp paprika
  • ½ tsp salt plus more for salting the zoodles
  • ¼ cup Siete grain free tortilla chips or other paleo cracker, crushed for topping! (omit if following strict Whole30 rules)


  • Preheat oven to 400. Place zoodles on a paper towel-lined plate and sprinkle them with a generous amount of salt (don't worry - you won't be able to taste it once you squeeze the water out of them!). Let the zoodles sit for 10-15 mins while you work on the mushrooms and sauce. The salt will help to remove some of the water. 
  • Heat a pan over medium high heat and add your cooking oil (or ghee). Add the sliced mushrooms and minced garlic. Cook until soft and beginning to brown, about 5-7 minutes. Add 1/2 of the cooked mushrooms and garlic to a blender. Set the remaining mushrooms aside.
  • Add the cashews, chicken broth, lemon juice, onion powder, paprika, and salt to the blender. Blend on high for 15 seconds until creamy. 
  • Add tuna to the pan with the remaining mushrooms/garlic and use a spoon to break it up into small pieces. Use a new paper towel to squeeze the water out of the zoodles. Add them to the pan. Add the mushroom/cashew sauce to the pan, as well. Mix everything together.
  • Transfer to a medium-sized casserole dish. Add crushed chips or crackers on top, then bake for 12 minutes. Broil for an extra 2-3 mins to brown the top. Serve and enjoy!


Calories: 245kcal | Carbohydrates: 16g | Protein: 18g | Fat: 14g | Saturated Fat: 4g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 27mg | Sodium: 510mg | Potassium: 722mg | Fiber: 2g | Sugar: 5g | Vitamin A: 237IU | Vitamin C: 25mg | Calcium: 56mg | Iron: 3mg