Preheat oven to 400°F.
Spread bottom half of each roll with a small bit of honey mustard.
Layer 1/4 of roast beef on each bottom half.
Top roast beef with 1/4 of turkey.
Place 4 triangles cheddar cheese on turkey on each sandwich.
Place 4 triangles Swiss cheese on each sandwich.
Place prepared sandwich bottoms (open-faced) on a foil-lined baking sheet.
Place sheet in preheated oven. Bake 4 to 5 minutes, until cheese is melted and bread is toasty.
Remove from oven.
Place a leaf or two of lettuce on top of the melted cheese.
Top with three slices of tomato.
Spread a generous amount of honey mustard onto top buns.
Place top buns on each prepared bottom.
Serve with a side of kettle chips in your favorite flavor, just like at Earl of Sandwich.