Sweet Potato Casserole

3 cup mashed sweet potatoes
1 cup sugar
1/2 teaspoon salt
2 beaten eggs
1/2 cup margarine melted
1/2 cup evaporated milk
1/2 teaspoon vanilla

Mix all ingredients together and put in a buttered casserole dish.

Topping:

1 cup brown sugar
1/2 cup flour
1 cup chopped nuts
1/3 cup melted butter

Crumble this mixture on top of mashed potatoes. Bake at 350F for 40 to 50 minutes.