Pecan Pie Sweet Potatoes

4 C. Cooked and mashed yams or sweet potatoes (I sliced the SP and boiled until cooked. The skin then peeled off easily)
1 C. Sugar
1/2 C. Butter melted
2 eggs
1 tsp. Vanilla

Topping:
1 C. Brown Sugar
1/3 C. Flour
1/3 C. Butter, melted
1 C. Chopped Pecans

Put Sweet Potato mixture in baking dish (I used 8x8.) Place mixed topping on Sweet Potatoes. Bake 30-45 min. @ 350.