sweet potatoe casserole slow cooker

2 cans 16 oz each of sweet potatoes or yams drained and mashed
1/2 cup of milk
1/4 cup of sherry
6 tbsp. of butter softened
1tsp of grated lemon peel
1/2 tsp of sat
dash of cayenne pepper
4 eggs
in a bowl beat sweet potatoes milk sherry and butter with electric mixture until smooth add remaining ingredients and beat well pour into a well sprayed crock pot cover cook on high for 1 hour then turn down to low for 3 - 4 hours