Spaghetti Squash Pie

Ingredients

• 2 cups cooked spaghetti squash, removed from skin and separated into noodles
• 1/4 cup parmesan cheese
• 2 egg whites, beaten
• 1 cup plain low-fat yogurt
• 3/4 lb lean ground beef
• 1/2 cup diced onion
• 1/2 cup diced green pepper
• 2 garlic cloves
• 1 (14 ounce) can tomatoes, diced
• 1 (8 ounce) can tomato sauce
• other spices (oregano, basil or your favorites)