Proof returns to Surly Pizza Upstairs for lunch on Friday, March 29th. Joining our Cold Cuts and Meatball hoagies are the following *Pastrami with braised red cabbage, Jarlsberg cheese, and caraway mustard sauce *The Greasy Sleeve: Fennel sausage, pepperoni, provolone, mozz, sauteed onions and bell peppers, lettuce, tomato, garlic aioli, chili flakes, and oregano If you…