Pasta Bolognese with Mushrooms

Ingredients

• 400 g mushrooms, finely chopped
• 1 zucchini, roughly chopped
• 1 brown onion, roughly chopped
• 1 large carrot, roughly chopped
• 1 stick celery, roughly chopped
• 2 tbsp tbs olive oil
• 2 garlic cloves, crushed
• 400 g beef mince
• 1 tsp dried oregano
• ¼ cup tomato sauce
• 800 g (large can) chopped tomatoes
• 400 g large pasta shells
• Finely grated tasty cheese, to serve