Cook ground beef with chopped onion, diced pepper, salt and pepper. Once cooked, pour in beer and Worcestershire sauce and cook until reduced.
Step 2/4
Peel the potatoes, cook in boiling salted water until tender, then mash. Add melted butter, salt and pepper to taste.
Step 3/4
Line bowl with plastic wrap and cover with mashed potatoes, leaving a hollow center. Fill the bowl with the beef mixture and close the ball, covering the meat with the mashed potatoes. Seal the plastic wrap. Repeat 8 times and place all the balls in the freezer for at least 1 hour.
Step 4/4
Once frozen, remove the plastic wrap and preheat the oven to 350 °F. Roll the mashed balls in flour, egg, then breadcrumbs and fry them. Drain the balls, removing excess oil, and place in a square baking dish. Place 1 slice of provolone on each ball and bake for 15 mins at 350 °F. Once out of oven, sprinkle with chopped parsley and enjoy.