Cool the filling: Hot filling can soften the wrappers before cooking.
Do not overfill: About 2 tablespoons per wrapper is usually enough.
Seal firmly: A little beaten egg along the final edge helps keep each roll closed.
Keep unused wrappers covered: Egg roll wrappers dry out quickly, so keep them under a slightly damp clean towel while assembling.
Cook in batches: Overcrowding lowers the temperature and prevents crisp browning.
Cheese Options
Provolone is a natural choice because it melts beautifully and complements beef without overpowering it.
However, you can also