In a deep-sided skillet, heat 1 inch of oil to 350°F.
In another skillet, heat a tablespoon of oil and cook the ground beef until cooked through, around 3-4 minutes. Add in garlic, onion and banana peppers, and sauté for 5-7 minutes to evaporate some of the liquid. Season meat with salt and pepper then add in the cornstarch and stir well to combine. Place meat into a bowl and cool, around 10 minutes. Fold in the provolone cheese and egg.