Wash and boil the yam until tender. Remove the skin and place the yam in a separate bowl. Mash the yam until it is slightly smooth, it is okay to have a little bit of lumps in it.

Add the chopped onion, chopped herbs, paprika, and parsley to the yam. Make the white sauce for the yam. Melt the butter in a sauce pan, add the onion and pimiento.

Mix in the flour and pour the milk. Stir and allow to cook until slightly thicken. Add the grated 3/4 of the grated cheese and grated nutmeg. Mix well. Pour into the yam and mix well.

Pour in a greased baking dish. Sprinkle cheese and a little finely chopped parsley over and bake in a preheated oven for about 45 minutes and bake at about 250 degrees Fahrenheit.