Shepherd'S Pie(British)  
["1 lb. ground lean beef or lamb", "1 large onion, peeled and chopped", "1 bay leaf", "2 oz. mushrooms, sliced", "2 carrots, sliced", "2 Tbsp. flour", "1 1/4 c. lamb or beef stock", "1 Tbsp. tomato paste", "salt and pepper", "1 1/2 lb. potatoes, peeled and quartered", "2 Tbsp. butter", "4 Tbsp. milk", "2 oz. Lancashire cheese, grated (if available) *"]
["*If not available, use a good quality Cheddar, preferably sharp."]
["ground lean beef", "onion", "bay leaf", "mushrooms", "carrots", "flour", "lamb", "tomato paste", "salt", "potatoes", "butter", "milk", "Lancashire cheese"]