Shepherd'S Pie(British)

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) *