1 1/8 lb Potatoes; 
     1    Onion
     1    Leek
   1/2 lb Mushrooms
     1 lb Minced beef/lamb
   1/2 oz Butter
     2 tb Milk
     1 tb Oil
     2 tb Tomato puree
     1 pn Dried thyme
          Salt and pepper
     1 oz Cheddar cheese
Peel and chop potatoes, onion and mushrooms. Finely chop leek.
 Boil potatoes until tender; drain. Mash with butter, milk, salt,
 pepper. Heat oil in frying pan.
 Fry leek and onion gently until softened. Add in mince and fry until
 browned. Drain off excess fat. Add in mushrooms, tomato puree, thyme.
 Season mince mixture with salt and pepper. Cook for ten minutes.
 Transfer to ovenproof dish.
 Top mince with a layer of mashed potato. Grate Cheddar and sprinkle
 over the potato.
Bake for 1/2-hour at Gas Mark 5/375F/ 190C until golden brown. Serve.
                 
                 Yields       
                4 servings                
