Spread roll bottoms with horseradish sauce. Layer with ham and cheese; replace tops. Arrange in a single layer in a greased 9-in.-square baking pan.
In a small skillet, heat butter over medium-high heat. Add onion; cook and stir 1-2 minutes or until tender. Stir in remaining ingredients. Pour over rolls. Refrigerate, covered, several hours or overnight.
Preheat oven to 350°. Bake, covered, 25 minutes. Bake, uncovered, 5-10 minutes longer or until golden brown.Yield: 1 dozen.
Connie, Vickie, Helen and Sandy - weary of always swapping recipes for Thanksgiving, Christmas and entertaining -- we decided to post them here. They are mostly southern, as we are -- proudly hailing from Kingsport, Tennessee, Dobyns-Bennett High School, and Trevecca Nazarene College.
Butter, mayo, and southern accents are key ingredients. Hope you enjoy - we certainly have!