Step 1: Prepare the Philly Cheesesteak Filling

1. Cook the Steak: In a large skillet, heat olive oil over medium-high heat. Add the sliced steak and season with salt, pepper, and garlic powder. Cook until the steak is browned and cooked through, about 3-4 minutes.
2. Add Onions and Peppers: Add sliced onions and bell peppers (if using) to the skillet. Sauté until softened and caramelized, about 5 minutes.
3. Add Worcestershire Sauce: Drizzle Worcestershire sauce over the steak and vegetable mixture and stir well to combine. The Worcestershire sauce adds a savory depth of flavor.
4. Melt the Cheese: Turn off the heat and place the chopped provolone cheese on top of the steak mixture. Cover with a lid and let the cheese melt for a minute, then stir to combine. The filling should be cheesy and gooey.
5. Cool the Filling: Set the filling aside to cool slightly before assembling the eggrolls. This makes it easier to handle and prevents the wrappers from tearing.

Step 2: Assemble the Eggrolls

1. Prepare the Wrapper: Lay an eggroll wrapper on a clean, dry surface in a diamond shape, with one corner pointing towards you.
2. Add Filling: Spoon about 2 tablespoons of the cheesesteak filling onto the lower part of the wrapper, just above the corner closest to you.
3. Fold the Wrapper: Fold the bottom corner of the wrapper over the filling, then fold in the two side corners, making sure the filling is fully enclosed.
4. Seal the Wrapper: Brush a little bit of the beaten egg on the top corner, then roll the wrapper tightly to seal the eggroll. The egg acts as a glue to keep the wrapper closed.
5. Repeat: Repeat with the remaining wrappers and filling until you have 12 eggrolls ready to fry.

Step 3: Fry the Eggrolls

1. Heat the Oil: In a deep skillet or large pot, heat vegetable oil to 350°F (175°C) for frying.
2. Fry the Eggrolls: Carefully place a few eggrolls at a time into the hot oil. Fry for about 2-3 minutes on each side or until golden brown and crispy.
3. Drain: Use a slotted spoon to remove the eggrolls from the oil and transfer them to a plate lined with paper towels to drain excess oil.

Step 4: Serve and Enjoy

1. Serve Warm: Arrange the eggrolls on a serving platter and serve with your favorite dipping sauce, like cheese sauce, ketchup, or spicy mayo.
2. Garnish: Sprinkle with fresh parsley or chives for a touch of color, if desired.