1Add the olive oil to a pan, alongside the tomatoes and garlic.
2Once soft, add the chilli flakes, salt and pepper, and the spaghetti, with 200ml boiling water.
3Heat on a high heat for 10 minutes or until the spaghetti is cooked, and add the spinach and most of the Parmesan.
4Cook until the spinach is wilted, serve, and top with additional Parmesan.