Melt unsalted butter and brush on about 1 tablespoon of melted butter on all the toasts. Just a few strokes especially around the edges of the toast to connect better.
Baking time wary on the type of oven you have. Check the roll around 15 minutes of baking just to make sure. You may use any type of salami or cheese. I loved using Italian blend because it got many different types of cheese, however, I made it before with cheddar, and sometimes with mozzarella only.