Oh, what a shame-- I'm a little late for your lunch. But I have a wonderful ham and swiss recipe that's made in a small sandwich bun. You place your ham (choose a good one, Virginia is nice) and cheese in a bun. Nuke 1/4 cup of butter, 1/8 cup minced onion, 1/2 tsp. worshetshire sauce (I ALWAYS spell this wrong--sorry), and 1/8 cup dijon mustard. Stir a couple times during cook time.
When melted and combined, pour into ham and cheese sandwiches (sauce recipe makes enough for four sandwiches). Wrap sandwiches in foil and bake 15 minutes at 350.
Try this next time you want a wonderful hot ham sandwich-- it's REALLY good!