Mozzarella and Crispy Salami Focaccia Sandwich

I was looking for more ways to use up that delish fresh mozzarella from my friend, and came up with this mozzarella and crispy salami focaccia sandwich that used up all kinds of leftovers from pizza night (including this Pizza Dough Focaccia). I see a lot of these sandwiches in my future. Guessipe focaccia olive…