Buddha Lo was in real trouble.

Yes, the reigning champion of “Top Chef” approached the first Quickfire Challenge of the reality television show’s 20th season — now airing Thursdays on Bravo — with skill and swagger. But he had cream when he needed butter. Could Lo successfully churn one ingredient from the other well enough to cook turbot? He was just one of 16 chefs flying around the on-set kitchen amid a chaotic pileup of mismatched