Sweet Potato Casserole
["3 c. sweet potatoes, cooked and mashed", "1 c. sugar", "1 tsp. vanilla", "1/2 c. margarine", "2 eggs", "1 c. brown sugar", "1 c. pecans, chopped", "1/3 c. flour", "1/3 c. margarine"]
["Cook 25 to 30 minutes at 350\u00b0."]
["sweet potatoes", "sugar", "vanilla", "margarine", "eggs", "brown sugar", "pecans", "flour", "margarine"]