Shepherds Pie Recipe

Name: Shepherds Pie Recipe
Ingredients: 25g/1oz dripping or 80ml olive oil; 1 large onion, finely chopped; 1small tin chopped tomatoes; 100g carrots, diced (optional); 100g assorted wild mushrooms, sliced(optional); 450g/1lb minced lamb-beef; 125ml chicken, beef or lamb stock; 100ml red wine; 1 tsp anchovy essence(optional); 10ml/2sp worcester sauce; 2 bay leaves; 2 sprigs of thyme; 1 tbsp plain flour; Salt and pepper; For the mash topping; 700g/1 ½ lb potatoes; 55ml/2 fl oz milk; 75g/3oz butter; 1 egg yolk