Our spin on an Internet favorite, this slow cooker comfort food does double duty, first on top of mashed potatoes, then stuffed into cheesy sandwiches later in the week.
To serve as a second meal for 4, reserve ⅓ of cooked beef, 2 pepperoncini, and 1 cup cooking liquid. Finely chop the pepperoncini and combine with the beef. Reheat both in the cooking liquid. Serve on 4 toasted buns, topped with 4 slices melted Swiss cheese.