Preheat oven to 375°. Melt butter in a large skillet; stir in flour until blended. Gradually add milk. Bring to a boil; cook and stir for 1-2 minutes or until thickened. Whisk in Onion Onion and soup until blended. Stir in ham and lemon juice; heat through. Pour into a greased 8x8 baking pan. Bake, uncovered, at 375° for 10 minutes. Meanwhile, prepare Perfect Parmesan Biscuits as directed on package with water and cheese. Drop 6-8 dollops of biscuit dough over ham mixture. Bake 18-22 minutes longer or until biscuits are golden brown. Makes 6 servings.