1. Prepare the Filling

Start by heating a large skillet over medium heat and add 2 tablespoons of olive oil. Once the oil is hot, add the thinly sliced onions and mushrooms. Sauté them for about 4 to 6 minutes until they soften, cook down, and start to get some color. This step develops a rich flavor base for the filling.

After the vegetables are done, add the thawed cheesesteak beef to the skillet. Using a wooden spoon or spatula, break apart the beef into smaller pieces as it cooks. Cook the beef for about 2–3 minutes or until it is fully cooked through. Season the mixture with salt and pepper according to your taste. A good tip is to use a slotted spoon to remove the beef and vegetables from the pan, leaving any excess fat behind, which can interfere with the texture of the egg rolls.

2. Prepare the Egg Roll Wrappers

While the filling cools slightly, prepare your egg roll wrappers. Keep them covered with a damp paper towel to prevent drying out while you assemble. This is important as dry wrappers can crack during rolling and frying.

3. Assemble the Egg Rolls

Lay one egg roll wrapper down in a diamond shape in front of you. Place one slice of cheese in the center, then add a generous spoonful of the beef and vegetable mixture right on top of the cheese. You can adjust the amount of filling to your liking; less cheese if you prefer a lighter taste or more for extra gooeyness.

Next, wet the edges of the wrapper with water—this acts like glue to seal the egg roll. Fold the bottom corner over the filling, then fold in the sides snugly. Continue rolling toward the top corner, pressing firmly so the edges stick together and form a tight roll.

4. Fry the Egg Rolls

Heat your frying oil in a deep skillet or fryer to 350°F (175°C). It’s important not to overcrowd the pan; fry the egg rolls in batches of 3 to 4 at a time to maintain the temperature and ensure even cooking.

Fry the egg rolls for about 3 to 5 minutes or until they are golden brown and crispy on all sides. Once fried, remove the egg rolls with a slotted spoon and drain on paper towels to remove excess oil.

5. Serve and Enjoy

Let the egg rolls cool for a couple of minutes before serving, as the filling will be very hot. These are delicious when served with dipping sauces such as spicy ketchup (ketchup mixed with sriracha) or your favorite hot sauce.