You can change the selection of deli meats to meet your preference. Capicola, prosciutto, and ham all work well.
The bottom of the rolls will remain very soft. If you prefer a firmer toasted bun:
• Before buttering, place the rolls face-down under the broiler and toast. Then proceed with adding butter on the inside and toasting, then continue with adding and toasting the cheese. This will keep the bread a bit firmer if that’s your desired texture.