Preheat oven to 450 degrees.

Place the flour, baking powder, and salt in a mixing bowl. Cut in the butter and shortening, using a pastry blender until the mixture resembles oatmeal flakes and then stir in the cheese. Make a well in the center, and pour in the milk and egg yolk. Stir until all the flour is blended and the dough leaves the sides of the bowl. The dough will be very moist. This can also be done in a food processor.

Transfer the dough to a lightly floured surface and knead it about 10 times. Roll out the dough some it is 3/4 inch thick, and cut out biscuits with a 2-inch cookie cutter. Re-roll the scraps and continue to cut out biscuits until the dough is used. Place the biscuits 1 inch apart on a parchment lined baking sheet and bake 12 minutes.

Split the biscuits in half and spread with honey mustard and fill with thinly sliced slivers of baked ham. Serve immediately.

Yield: approximately 12 biscuits