Penne spicy tomato sauce

INGREDIENTS

• 2 tsp olive oil
• 1 onion, peeled, finely chopped
• 3 garlic cloves, peeled, finely chopped
• 1 red chilli, seeds removed, finely chopped
• 1 x 400g/14oz can chopped tomatoes
• splash red wine vinegar
• 1 tbsp tomato puree
• Tabasco sauce, to taste
• 1 tsp sugar
• small bunch fresh basil leaves, torn
• salt and freshly ground black pepper
• 1 x 125g/4½oz ball fresh buffalo mozzarella, crumbled
• 400g/14oz dried penne pasta, cooked according to packet instructions, drained
• grated parmesan, to serve