Preheat oven to 375 F. Microwave squash for a few minutes to soften shell. Cut lengthwise & remove membrane & seeds. In a baking dish, place cut side down & bake for 45 minutes until tender. Remove from oven & cool until it can be handled. Using a fork, run it inside the squash to create spaghetti ‘noodles’.
Meat Sauce
In a large saucepan, brown ground beef, onions, garlic & mushrooms. Cook until meat is no longer pink. Stir in tomatoes, green pepper & spices. Reduce heat & simmer for 10 minutes.
Serving
Divide spaghetti noodles between 4 serving plates & top each with a quarter of the meat sauce. Sprinkle with grated Parmesan & serve with fresh bread sticks.