Who's coming to dinner? Only some of the biggest names in heavy metal. Rob Zombie, Scott Ian, and Gary Holt all join the judges' panel this week.

We can't tell if Tiffani is more angry or excited about making dumplings again. Maybe she's an-cited? ex-gry?

Tiffani begins working on her first creation: a smoked lobster and uni dumpling.

After issuing her own challenge (a signature craft cocktail that's derivative of a classic cocktail and an American classic canapé), Tiffani gets to work on a cross between a mojito and an Old Fashioned.

A little nitrogen with your butter? Tiffani uses the surprise ingredient to turn the pancetta butter into a powder that instantly melts onto her signature mini biscuit.

When the chefs are issued a vegan challenge, Tiffani pulls out all the stops (and ingredients). Her sous chef Gabriel lends a hand.

Tiffani gets to work on a Thai street food-inspired sauce for her noodles.

The musician/director is less than impressed when he learns Dale isn't a metal fan.