spaghetti squash and chicken skillet casserole

Ingredients

• 3 tablespoons butter
• 1 cup mushrooms, freshly sliced
• 1/3 cup leeks, chopped
• 1/4 cup celery, chopped
• 3 tablespoons red bell pepper, chopped
• 3 tablespoons parsley, fresh and chopped
• 2 cups spaghetti squash, cooked
• 4 - chicken breasts, boneles and cut in 1/2" strips
• 1/4 cup croutons, seasoned and crushed
• 1/4 teaspoon salt
• 1/4 teaspoon seasoned pepper
• 5/8 teaspoon garlic powder
• pinch summer savory, dried
• 1/2 cup sour cream
• 2 ounces swiss cheese, shredded