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Keto Holiday Left-Overs Casserole

Here is a delicious and versatile keto recipe to help you take advantage of those thanksgiving/holiday left-overs.  We made our version with turkey, but this recipe would work well with ham, turkey, goose, or beef.  
Course Main Course
Cuisine American
Prep Time 15 minutes
Cook Time 40 minutes
Resting Time 5 minutes
Total Time 55 minutes
Servings 10


Casserole Ingredients

  • 16 oz Riced Cauliflower
  • 8 oz chopped mushrooms
  • 4 cups Cooked leftover turkey, ham, or beef
  • 1/4 cup chopped Onion
  • 4 tbsp Butter
  • 1 tsp sage
  • 2 tsp 21 Seasoning Salute or a Similar Season Blend
  • 1 tsp Poultry Seasoning

Cheese and Sauce Mixture

  • 1 cup Sour Cream
  • 1/2 cup mayonaise
  • 2 tbsp Dijon Mustard
  • 1/2 tsp 21 Seasoning Salute
  • 1/2 tsp Poultry seasoning
  • 1 cup Mozzarella Cheese (shredded)
  • 1 cup Parmesan Cheese


  • Using a 9 x 13 casserole dish, grease with butter, coconut, or avavocado oil cooking spray.  
  • Preheat your oven to 375 degrees
  • Begin by sautéing your onions in butter until they are softened. Remove your softened onions, and using the same pan add more butter (2 Tbsp).  Add your chopped mushrooms and brown and soften your mushrooms.
    After your mushrooms have softened and become slightly browned remove them and add your cooked onions and browned mushrooms to your casserole dish and set aside.
  • Using the same skillet add your 16 oz of riced cauliflower and let it cook until it is slightly brown and soft.  
  • Add your 4 cups of chopped turkey to your casserole dish and stir into your onions and mushrooms.  

Cheese and Sauce Mixture Instructions

  • In a separate bowl, combine 1 cup of sour cream, 1/2 cup of mayonnaise and 2 tablespoons of Dijon mustard (add additional seasonings if desired).  Whisk to combine.
  • Add sauce into your casserole dish and combine well.  Add 1 cup of mozzarella cheese, and 1/4 cup of grated parmesan cheese.  Mix to combine with other casserole ingredients.
  • Bake at 375 degrees for 40 minutes or until golden brown
  • Let set 5 minutes before serving.