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5 from 19 votes

Whole30 & Paleo Tuna Zoodle Casserole

Prep Time10 mins
Cook Time25 mins
Zucchini "Sweating" Tiime30 mins
Course: Main Course
Cuisine: American
Keyword: paleo casseroles, paleo comfort food, paleo tuna casserole, whole30 casseroles, whole30 comfort food, zucchini noodle recipes
Servings: 4 servings
Calories: 348kcal


  • 2 large zucchini or 3 small
  • 1 tsp sea salt plus more to taste
  • 3 pouches StarKist Selects E.V.O.O.® Yellowfin Tuna (2.6 oz each) - Drain if you are using canned
  • 1 tbsp avocado oil or your cooking oil of choice
  • 1/2 medium onion chopped
  • 8 oz mushrooms sliced
  • 3 cloves garlic minced
  • pepper to taste

Cashew Cream Sauce

  • 3/4 cup raw cashews
  • 3/4 cup bone broth or chicken broth or water
  • 2 tbsp lemon juice
  • 1 tsp onion powder


  • Preheat oven to 350 degrees F.
  • Use a spiralizer or a vegetable peeler to slice the zucchini into zoodles (zucchini noodles).
  • Chop the zoodles roughly so they aren't too long.
  • Place the zoodles in a colander over a bowl and sprinkle with sea salt. Let this sit for 30 minutes to sweat while you prepare the rest of the ingredients.
  • Place all ingredients for the cashew cream sauce in a high speed blender and blend until smooth and creamy. Set aside.
  • Heat avocado oil in a large skillet over medium heat.
  • Add onion and sauté for 3-4 minutes until fragrant.
  • Add mushroom and garlic with salt and pepper and cook stirring for 5 minutes until the mushroom slices are softened.
  • Stir in StarKist Selects E.V.O.O.® Yellowfin Tuna and break apart the meat. Remove from heat.
  • Wrap the zoodles in a paper or kitchen towel and squeeze out as much liquid as possible.
  • Stir zoodles and the cashew cream sauce into the tuna and vegetable mixture.
  • Transfer to a 9x9 baking dish and bake for 12-15 minutes until lightly browned.
  • If you'd like, you can serve with chopped parsley and/or red pepper flakes!


Serving: 1serving - makes 4 | Calories: 348kcal | Carbohydrates: 15g | Protein: 23g | Fat: 15g | Saturated Fat: 4g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 5g | Cholesterol: 23mg | Sodium: 763mg | Potassium: 625mg | Fiber: 3g | Sugar: 6g | Vitamin A: 195IU | Vitamin C: 23.3mg | Calcium: 32mg | Iron: 2.3mg