Martha Stewart always gets treated well at restaurants. The domestic diva was spotted looking glamorous as she held court at the round center table at a packed Il Mulino on the Upper East Side on Wednesday night. An observer told us, “The chef visited Martha’s table. Then her server brought over a giant gorgeous white truffle and just kept shaving . . . and shaving . . . and shaving it over her entree. Lucky lady.” White-truffle pasta at Il Mulino is $250, so we hope Martha will tell us how it tastes.