sentence: add olive oil to a hot pan and add pieces of lamb sentence: finely dice an onion garlic carrot and celery and add to the pan sentence: add thyme and flour to the pan and stir sentence: pour chicken stock to the pan sentence: add diced tomatoes lamb salt and pepper to the pan sentence: place the pan in the oven and heat for about an hour sentence: place small pieces of butter and milk into a pot of boiled potatoes sentence: mash the potatoes with the butter and milk sentence: place the lamb and potatoes in a small bowl