admitting recognizing realizing
When the dish arrives,he is  shocked  to discover that "steak tartare" is  actually  a raw hamburger.He  makes  an attempt to eat it,but it is  clear  ,from the look on his face,that he finds the taste really terrible.He cannot  hide  his feelings,except when the waiter asks whether everything is OK.He smiles and nods,  [MASK]  that everything is fine.