To make this simple casserole you will need:
700g diced beef
1 tablespoon vegetable oil
1 tablespoon of plain flour
400g tin of chopped tomatoes
pinch of salt and pepper
In the same pan add the beef and flour and cook just until the flour has disappeared, you don't have to brown the meat.
I told you it would be alright. I like a thick gravy so cooked it for a further two hours.