Preheat oven to 425 degrees.
Lightly beat eggs then add spices, milk and sugar. Mix together.
Fold egg mixture into mashed sweet potatoes.
Pour into unbaked pie shell and place in 425 degree oven for 15 minutes.
Turn oven down to 350 degrees and continue baking for 35-45 minutes. Knife should come out clean when done.
Remove from oven and cool completely. Refrigerate!