Heat oven to 350 degrees F. Combine ⅓ cup sugar and butter in large bowl. Beat at medium speed until creamy. Reduce speed to low; add 1-½ cups flour and ½ teaspoon nutmeg. Beat until well mixed. (Mixture will be crumbly.) Press crust mixture onto bottom of ungreased 13x9-inch baking pan. Bake for 15 to 17 minutes.
Meanwhile, combine all filling ingredients except nutmeg in same bowl. Beat at medium speed, scraping bowl often, until mixture is creamy. Spread filling over hot, partially baked crust; sprinkle with ⅛ teaspoon nutmeg. Continue baking for 28 to 33 minutes or until set. Cool completely. Cut into bars with wet knife. Store refrigerated. ©2001 Land O’Lakes, Inc.