Crunchy Topped Sweet Potatos

1 1/2 c. mashed sweet potatoes
1/2 c. sugar
1/2 tsp. vanilla
1 egg
1/2 c. margarine, melted
1/4 c. sweet milk

Crunch
1/2 c. brown sugar
1 1/2 Tbsp. margarine
1 c. chopped pecans
2 Tbsp. flour
Mix above ingredients. Turn into baking dish. Sprinkle crunch on top. Bake at 325 degree for 30-45 minutes