Puffed Sweet Potato

2tbls butter
2 cups mashed sweet potato
1/2 cup milk
1 egg separated

Melt 1tbls butter and to it add milk, season generoulsy.  Beat mixture into sweet potato.  Add yolk and mix well.  Beat egg while until stiff and fold through mixture.  Use tbls butter to grease a muffin tray and dollop mixture into mould, bake in a mod oven for 20 -25 mins or until nice and golden