sentence: heat oil in a sauce pan add the chopped onions add minced lamb and brown it sentence: add in the carrots tomato puree some lea and perrins and stir it together sentence: pour the beef stock into the pan and season with some black pepper salt and bisto powder sentence: pour the beef into an oven proof dish sentence: pipe on the mashed potatoes and sprinkle cheese on top of it sentence: place it in the pre-heated oven sentence: serve the dish with peas