In a large mixing bowl, combine cold leftover mashed potatoes, shredded cheddar cheese, cooked bacon, chopped chives, garlic powder, black pepper, salt, and beaten egg. Mix thoroughly until well-blended.

Scoop approximately one tablespoon of the mixture and form it into a ball. If the mixture is too soft, chill in the refrigerator for 15-20 minutes.

Prepare a dredging station with three plates: one with all-purpose flour, one with a beaten egg, and one with breadcrumbs. Roll each ball in flour, dip in egg, and coat in breadcrumbs.

Heat about 2 inches of oil in a deep pan to 350°F (175°C). Fry the coated bites in batches for 2-3 minutes per side until golden brown.

Remove the bites and drain on paper towels. Allow to cool slightly before serving with your favorite dips.