
brown your stewing steak and put in a casserole dish or slow cooker. then in the pan you used gently cook some onions in a big nob of butter till they go translucent. then add a bit of plain flour till it forms a lightly browned mush- the onion should be completely degenerated in the roux.
add to this a pint of beef stock, bring to the boil. add mustard, salt, pepper and a couple of bay leaves if you have them.
pour your gravey over the meat and cook on a low heat for a few hours.
seriously good stew :)