Penne with spicy tomato and mozzarella sauce

INGREDIENTS

• 2 tsp olive oil
• 1 onion
• 3 garlic cloves
• 1 red chilli
• 1 x 400g/14oz can chopped tomatoes
• splash red wine vinegar
• 1 tbsp tomato purée
• sauce, to taste Tabasco
• 1 tsp sugar
• small bunch fresh basil
• salt and freshly ground black pepper
• 1 x 125g/4½oz ball fresh buffalo mozzarella
• 400g/14oz dried penne pasta
• grated parmesan