Sweet Potato Casserole

3 c mashed sweet potatoes
1/2 c sugar
2 eggs, beaten
1/4 c melted margarine
1/2 c milk
1 1/2 tsp vanilla

Topping
1 c brown sugar
1/3 c flour
1 c chopped pecans
1/3 c margarine, melted

Mix sweet potatoes, sugar, eggs, margarine, milk and vanilla.
Pour into 9 inch baking dish.
Mix topping ingredients and sprinkle over potato mixture.
Bake at 350 for 35-40 minutes.