½ cup panko breadcrumbs (or fine fresh breadcrumbs)
Salt to taste
Finish & Garnish:
Fresh cilantro, finely chopped
Extra lime zest
Optional: a few drops of Angostura bitters per oyster
Method
Make the Pisco Sour Breadcrumb Butter In a bowl, mix butter, Pisco, lime juice, lime zest, aji amarillo, simple syrup, garlic, and salt until smooth. Fold in the breadcrumbs last so they stay light and textured. Chill 10–15 minutes to firm slightly.
Prep the Oysters Heat broiler to high. Arrange oysters on a tray packed with rock salt so they stay level.
Top & Broil Spoon about 1 tablespoon of the breadcrumb butter onto each oyster. Broil 4–6 minutes, until the oysters just curl and the topping is bubbling and golden.
Finish Remove from heat. Add a drop of bitters if using, a sprinkle of fresh cilantro, and a final hit of lime zest.