Shepherd'S Pie(British) - cooking recipe

Ingredients

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) *

Preparation

*If not available, use a good quality Cheddar, preferably sharp.