01 -
In a large skillet over medium-high heat, brown the ground beef and chopped onion together, breaking up the meat as it cooks. Drain any excess fat from the pan.
02 -
Stir in the cheddar cheese, ketchup, mustard, Worcestershire sauce, salt, and pepper. Cook until the cheese is completely melted and incorporated. Remove from heat and let cool slightly.
03 -
Place about 2 tablespoons of the filling in the center of each egg roll wrapper. Fold the bottom corner over the filling, fold in the sides, then roll tightly toward the top corner. Seal the edge with beaten egg.
04 -
Heat vegetable oil in a deep fryer or large, deep skillet to 350°F (175°C). The oil should be deep enough to cover the egg rolls.
05 -
Carefully place egg rolls in the hot oil, a few at a time to avoid overcrowding. Fry for 2-3 minutes per side until golden brown and crispy all around.
06 -
Remove egg rolls with a slotted spoon and drain on paper towels. Serve hot with your favorite dipping sauces like ketchup, mustard, or special sauce.