Spaghetti Squash and Beef Bake

Ingredients

• 1/2 lb (.2 kg). lean ground beef
• 3/4 cup (175 ml) chopped onion
• 1 tsp (5 ml). grated garlic
• 1 tsp (5 ml). oregano
• 8 oz (224 grm). tomato sauce
• 2 cups (475 ml) spaghetti squash
• 2 tbsp (30 ml) melted butter
• 1/8 tsp (1 ml). each salt and pepper
• 15 oz (420 grm). ricotta cheese
• 2 eggs, lightly beaten
• 1 cup (225 ml) mozzarella cheese, shredded
• 1/4 cup (60 ml) parmesan cheese