SHANQ's Sweet Potatoes

-4 cups mashed sweet potatoes (about 4-6 potatoes)
-1/2 cup white sugar
-2 T vanilla
-4 eggs, beaten
-1/2 pint heavy cream
-1/4 pound butter
-1 cup brown sugar
-1/2 cup all purpose flour
-1 1/4 cups chopped pecans

Butter/grease 2 quart casserole dish.  Preheat oven to 350 degrees.  Combine mashed sweet potatoes, sugar, vanilla, eggs, and cream.  Blend well and spread into casserole dish. Prepare the topping by combing butter, brown sugar, flour, and pecans.   Mix until crumbly and sprinkle over sweet potato mixture.  Bake for 30 minutes.