Melt 2 tablespoons butter in skillet and saute the pecans until lightly browned. Drain on paper towels. Place brown sugar, half-and-half, and remaining butter in a heavy saucepan. Heat over low heat stirring steadily, until the sugar dissolves and buter is melted. Let cool. Place egg and butter mixture into a blender and blend on medium speed until mixture is smooth. Slowly add the cream and salt and continue blending on low speed until mixture is very smooth, about 30 seconds. Add pecans. Transffer mixture to your ice cream machine and freeze according to the manufacturer's instructions. Makes about 1 quart of Butter Pecan Ice Cream