01 -
Heat a large skillet over medium-high heat and brown the ground beef with the chopped onion, breaking up the meat as it cooks. Once the beef is fully cooked, drain off any excess fat.
02 -
Mix in the cheddar cheese, ketchup, yellow mustard, Worcestershire sauce, salt, and pepper. Stir everything together and cook until the cheese melts completely. Take it off the heat and let it cool down a bit.
03 -
Put about 2 tablespoons of filling in the center of each egg roll wrapper. Fold the bottom corner up over the filling, fold in both sides, then roll tightly toward the top corner. Use the beaten egg to seal the edge so it stays closed.
04 -
Heat vegetable oil in a deep fryer or large, deep skillet to 350°F. Make sure you have enough oil to completely cover the egg rolls when frying.
05 -
Carefully add a few egg rolls at a time to the hot oil - don't overcrowd the pan. Fry for 2-3 minutes on each side until they're golden brown and crispy all over.
06 -
Use a slotted spoon to remove the egg rolls and let them drain on paper towels. Serve them hot with your favorite dipping sauces like ketchup, mustard, or special sauce.