Where did the Feta go?

In the opening episode of Season 20 of Top Chef ™ (World All-Stars), Amar and Ali teamed together to make a pan-roasted sea bass with a kimchi emulsion and baba ganoush. When the judges asked them why they teamed together, Amar said "because we both had feta cheese in our baskets!"

So, the question is, where did they put the feta cheese in their finished dish? 

Kimchi Emulsion - ordinarily, a keen cook would blend kimchi with mayonnaise and lemon juice to make a wonderful kimchi sauce. It's perfectly