Probably, Xel thinks as the door swings shut behind him on a pleasant(ly sadistic), "Hai, hai, Ivonka-san is definitely my favorite cute employee," cheerfully and without remorse. That's what makes it fun. He hopes that the idea has at least prompted the natural bully to think a little.
"So have the dough made into a crust," he instructs Rincewind in a helpful singsong, and hands him a bottle of sticky, sweet tsume sauce. "Tell them it should be golden, not brown, and have them brush this over it instead of tomato sauce before heating it. --Obviously no cheese," he adds hastily, just in case it wasn't actually obvious.