What was found
EMERGENCY DELCARED, UNEVENTFUL LANDING DUE TO AN LE SLAT DISAGREE, THE QRH LEAD US TO A LE SLAT ASYMMETRY CHECKLIST, COMPLETED THE CHECKLIST AND DID AN AIR TURN BACK, PERFORMED OPERATIONAL CHECK AND TROUBLESHOT PER EO B757-2780-01373. OPS CHECKED GOOD.