Chicken Sausage With Peppers

Name: Chicken Sausage With Peppers
Cuisine: American
Ingredients: 1 onion; 3 bell peppers in different colors; 2 medium zucchini; 4 links precooked chicken sausage; 2 tbsp (30 mL) olive oil; 1 can (8 oz. or 213 mL) tomato sauce; ½ tsp (2 mL) dried oregano; ¼ tsp (1 mL) salt; ¼ tsp (1 mL) red pepper flakes; 1 garlic clove, pressed; Optional: fresh chopped parsley, mozzarella cheese