Sweet Potato Casserole
["2 large can sweet potatoes or yams in heavy syrup", "3 large eggs", "2 tsp. vanilla flavoring", "1 c. brown sugar, packed", "1 stick margarine", "1 tsp. cinnamon (if desired)"]
["Combine ingredients (while preheating oven).", "Cook at 350\u00b0 for 30 to 40 minutes or until done."]
["sweet potatoes", "eggs", "vanilla flavoring", "brown sugar", "margarine", "cinnamon"]