In a bowl, combine corned beef, cabbage, carrots, cheese, black pepper, and garlic powder.
Lay an egg roll wrapper flat, add 2 tablespoons of the filling, and fold the wrapper tightly.
Heat oil in a deep pan to 350°F (175°C).
Fry the egg rolls in batches for 3-4 minutes until golden brown, then drain on paper towels.
Serve hot with Thousand Island dressing.