Preheat oven to 350°F.
For Crust: Combine butter and brown sugar in a small bowl. Add flour and pecans; mix until crumbs form. Press into bottom of a greased 13 x 9-inch baking pan. Bake 12 minutes.
For Cheesecake Layer: Beat cream cheese and sugar together in medium bowl. Add egg, milk, lemon juice and vanilla, mixing until smooth. Spread over baked crust.
For Pecan Topping: Beat eggs until foamy. Add remaining ingredients; mix well. Lightly spoon pecan topping over cheesecake layer.
Bake 23 to 28 minutes or until edges are lightly browned and cheesecake is set. Cool in pan on wire rack before cutting into squares.