gramsie's sweet potato casserole

Ingredients

• 1 cup sugar
• 2 - beaten eggs
• 2 tablespoons self rising flour
• 1/2 teaspoon salt
• 1/2 stick margarine
• 1/2 cup milk
• 1 teaspoon vanilla
• 1 teaspoon cinnamon
• 1/2 teaspoon nutmeg
• 3 cups canned (drain liquid) or fresh cut sweet potatoes
• TOPPING
• 3/4 cup brown sugar
• 3/4 stick margarine (do not melt)
• 1 1/4 cups chopped pecans
• 1/2 cup all purpose flour