One chicken breast, butterflied and seasoned with garlic and onion powder.
Lay it on a piece of foil on a baking sheet.
Spread a nice layer (depending on taste) of stone-ground mustard over the chicken.
A slice or two of ham.
And then 1/2 ounce (thin slices) of your favorite cheese. I didn’t have Swiss, so I used Jack.
Bake @ 350 for about 15-20 min until chicken is fully cooked.