To make Tatties and Neeps(Potatoes and Turnips),first peel and chop the potatoes,turnips and onion.Then,boil the potatoes in one saucepan and the turnips in another.Next,put the potatoes and the turnips in a bowl.Add the onion,salt and pepper.Finally,mash them and mix them very well together.You can serve Tatties and Neeps with haggis or any other meat.