Tomato Tofu Pie

Ingredients

• 1 medium onion, chopped
• 1 Tbsp. oil
• 1 c. spaghetti sauce
• 1/2 tsp. or less salt
• dash of pepper
• 1 lb. firm tofu, drained, patted dry with towel and chopped in small pieces
• 6 oz. part-skim Mozzarella cheese, grated
• 2 Tbsp. chopped fresh parsley
• 9-inch pie crust (optional)