Paula Deen's Sweet Potato Toffee Pie

PAULA DEEN’S SWEET POTATO TOFFEE PIE½ (14.1-oz.) pkg. refrigerated piecrusts3 c. mashed cooked sweet potatoes2 ½ c. toffee bits, divided1 (14-oz.) can sweetened condensed milk½ c. butter, melted and divided2 eggs1 t. vanilla½ t. ground cinnamon½ t. ground nutmeg¼ t…