Sausage pasta bake

Ingredients

• 6 thick beef sausages (480g)
• 375 gram (12 ounces) penne
• 1 tablespoon olive oil
• 1 medium brown onion (150g), chopped coarsely
• 1 small red capsicum (bell peppers) (150g), chopped coarsely
• 1 small yellow capsicum (bell peppers) (150g), chopped coarsely
• 1 large zucchini (150g), sliced thinly
• 200 gram (6½ ounces) button mushrooms, quartered
• 1/4 cup loosely packed coarsely chopped fresh basil
• 700 gram (1½ ounces) bottled low-salt tomato pasta sauce
• 1 cup (100g) coarsely grated mozzarella
• 1/2 cup (40g) coarsely grated parmesan