01 - Preheat oven to 350°F (180°C).
02 - Place chicken breasts between two sheets of plastic wrap and pound to about 1/2-inch thickness using a meat mallet.
03 - Season both sides of the chicken breasts evenly with salt, pepper, garlic powder, and paprika.
04 - Lay 1 slice of ham and 1 slice of Swiss cheese on each chicken breast. Roll each breast tightly, tucking in the ends, and secure with toothpicks.
05 - Set up three shallow bowls: place flour in the first, beat eggs with milk in the second, and combine panko breadcrumbs with Parmesan cheese in the third.
06 - Coat each chicken roll first in flour, then dip in the egg mixture, and finally coat thoroughly in the panko-Parmesan mixture.
07 - Heat oil in a large oven-safe skillet over medium-high heat. Sear each chicken roll until golden brown on all sides, about 2–3 minutes per side.
08 - Transfer skillet to the oven (or place chicken rolls on a baking sheet) and bake for 20 minutes, until chicken is cooked through and cheese is melted.
09 - Remove toothpicks before serving. Slice each roll and serve hot.