That is something I can't answer you. Since you mentioned Pepperoni, let me tell you that it is actually a variety of salami, in case you didn't know.
I wouldn't suggest adding a cure porked and beef mixed-together product in my bread, but I guess you could try, I'd add it in from the start I suppose.
I love cooking but I am a terrible baker! I need to bake an apple crumb cake, what do I do? Well, I don't have any advice to give. Have you ever baked bread? It is the item most commonly baked Ohh bread.. Maybe I will make that... How do you make bread? Let me see. I know that bread is prepared using a dough of water and flour. You don't need anything else? What if I add pepperoni to it? Do I put in from the start or later on in the cooking process?
Pepperoni (also known as pepperoni sausage) is an American variety of salami, made from cured pork and beef mixed together and seasoned with paprika or other chili pepper.