Some people keep little yellow ware dishes for this purpose, or other dishes that cannot be damaged by baking. Spread with a teaspoon a slight coating of soft butter over the inside of the dish, drop in two eggs, not beaten, and set them inside the oven, or, perhaps, on the top of the range on one side. Try by shaking, and take them from the fire when the whites are quite cooked. Send in the same dish set in a flat one.