Sweet Potato Souffle

3 cups mashed sweet potatoes, drained
3/4 stick margarine, melted
1 cup sugar
1/2 tsp. salt
2 eggs, well beaten
1 tsp. vanilla
1 tsp. cinnamon
1/3 tsp. nutmeg
1/3 cup milk

Topping:

1 cup brown sugar
1 cup pecans
1/3 cup flour
1/4 cup margarine, melted

Preheat oven to 350. Mix all ingredient with a hand mixer and pour into a sprayed 9x13 inch pan. Combine all the topping ingredients and sprinkle over sweet potato mixture. Bake for 30 min.