Freeze and Bake Later Method: Prepare mini reubens as directed except do not bake. Layer between sheets of waxed paper in a resealable plastic freezer container. At serving time, heat oven to 350°F. Place desired number of mini reubens onto ungreased baking sheet. Bake 12-15 minutes or until cheese is melted and filling is hot. Garnish with parsley, if desired. Serve warm.