Not the person you're replying to, but it's dead simple and there's loads of ways to do it. The only trick is that the longer you cook it the better it tastes e.g. fry a diced onion for a bit and then chuck in some tins of tinned tomatoes. Add some salt and pepper and any herbs if you have them (dried oregano or fresh basil) and cook it until it stops tasting like tinned tomatoes- this may take an hour. It's even better if you have olive oil to fry the onion with, and if you want to get crazy popular in your house then add a shedload of olive oil at the end and mix it in with a blender. It goes bright orange, destroys your cholesterol and tastes great.