Step 1: Heat the oven at 180 C.
Step 2: Spread a sheet on a flat surface.Cut the sheet into 3 inch squares and butter all of them and stack 3 sheets on one top of the other.
Step 3: Spread a layer of honey-mustard dressing on the filo sheets.
Step 4: Layer out chopped ham slice over the honey-mustard leaving an inch on each side uncovered.
Spread the grated assorted cheese evenly over the ham.
Step 5: Fold the sheet into triangles twice over.
Step 6: Make egg wash by whisking a teaspoon of water into the egg and brush the top of the triangles and place them over on a baking sheet.
Step 7: Bake it for 10-12 minutes till they turn golden brown.