Preheat oven to 425°. Lightly grease a baking sheet.
Place flour in a medium bowl. Using a pastry blender, cut in butter until mixture is crumbly. Add cheese and green onion, stirring to combine well. Add half-and-half, stirring until dry ingredients are moistened.
On prepared baking sheet, evenly divide dough into 12 mounds 2 inches apart. Bake for 18 to 20 minutes or until lightly browned.
To serve, split biscuits, and spread desired amount of Orange Horseradish Spread onto top and bottom halves of each biscuit. Place ham slices between prepared biscuit halves.