gluten free meals

Easy Spaghetti Squash Casserole

Delicious low carb Spaghetti Squash Casserole is a great alternative to traditional pasta, packed with vegetables but you’d never know it! Tasty, flavorful and oh so comforting on a cold winter day.

Course Main Course
Keyword gluten-free, low-carb, spaghetti squash casserole, vegetarian meal
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings 4 people
Author Fit in Progress


  • 1 medium sized spaghetti squash
  • 2 small zucchini
  • 1 medium onion
  • 1 jar Marinara sauce
  • 8 oz mozzarella
  • 1 Tbsp butter
  • fresh basil leaves for garnish (optional)


  1. Pierce the squash with a fork 3-4 times. Microwave for 3 minutes, then rotate and microwave for another 3 minutes. Repeat 2-3 times.

  2. While the squash is cooking, saute chopped onions in butter on medium heat for 5-6 minutes stirring frequently.

  3. Shred the zucchini and put it in a large bowl. Add the sauteed onion.

  4. Let cooked squash cool for a few minutes. Carefully cut in half and shred with a fork into the bowl.

  5. Add marinara sauce and mix well.

  6. Pour into a greased casserole dish and bake at 350 degrees for 40 minutes.

  7. Spread sliced mozzarella cheese on top of the casserole and bake for another 10 minutes until the cheese is melted. Sprinkle with chopped fresh basil leaves for garnish (optional).