Combine flour, oats, 1/2 cup brown sugar and 1/2 cup butter; mix until crumbly. Press into ungreased 13x9x2-inch pan. Bake 350 oven for 15 minutes.
Combine pumpkin, evaporated milk, eggs, sugar, salt, cinnamon, ginger and cloves in bowl; blend well. Pour into crust. Bake in 350 oven 20 minutes
Combine pecans, 1/2 cup brown sugar and 2 Tbsp. butter; sprinkle over pumpkin filling. Return to oven and bake 15 to 20 minutes or until filling is set. Cool in pan on rack and cut in 2-inch bars. Serve with whip cream or ice cream.