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Cheesy Yellow Squash Casserole

recipes vegetables & sides Dec 17, 2020

It’s that time of year to enjoy warm, comforting casseroles that are sooo satisfying even the non-low carb friends and family will approve! 

Recipe By: MetFlex Tribe Member, MJ
Prep Time: 10 mins Cook Time: 25 mins Total Time: 35 mins  
Makes 10 Servings


For the squash mixture:

  • 3 tablespoons salted butter
  • 1 medium red onion, diced
  • 5 cups yellow squash, chopped
  • 1 teaspoon onion powder, divided
  • 1 teaspoon sea salt (I always use Redmond Real Salt)
  • 1 tablespoon fresh chives, chopped
  • ¾ cup Avocado Oil Mayo (Primal Kitchen)
  • ¾ cup Sour Cream
  • 1-1/2 cups shredded Sharp Cheddar Cheese
  • Avocado Oil spray

For the topping:

  • 1 tablespoon salted butter, melted
  •  ½ tablespoon fresh chives, chopped
  • 1 cup Pork Panko


  1. Preheat the oven to 350 degrees. In a large sauté pan over medium/high heat, add the butter, onion, squash, ½ teaspoon onion powder, and salt. Sauté until squash is tender. 
  2. While the squash is sautéing, in a separate bowl add the chives, mayo, sour cream, sharp cheddar cheese, and ½ teaspoon onion powder. Mix until fully combined. 
  3. When the squash is cooked, add the mayo mixture to the squash and mix well.
  4. Spray a baking dish with avocado oil spray and add the squash mixture to the baking dish.
  5. Prepare the topping. In a small bowl, add the melted butter, chives, and pork panko. Give it a good toss and then sprinkle over the top of the squash mixture.
  6. Bake for approximately 25-30 minutes until the top is browned and bubbly.
  7. Remove from oven and allow to cool for 15 minutes. Enjoy! 

Nutrition Per Serving: 256 Calories, 25.4g Fat, 6.3g Protein, 7.3g Carbs, 1g Fiber, 6.3g Net Carbs 

Note: To lower calories for the recipe, you can reduce the amount of butter used and cut the mayo, sour cream, and cheese amount in half.

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