MOB's Vodka Rigatoni
Add a splash of olive oil to a pan. Add your onions. Cook until translucent, and then add your garlic and chilli. Fry for a minute, and then add your purée. Mix it in, and then cook for 4 minutes on a medium heat, allowing the tomato mix to catch on the pan.
Add 100ml to your vodka sauce. Stir it in. Then add grated parmesan, salt and pepper. Mix it together and bubble on a low-medium heat until the cheese has melted.