"These are FULL of flavor...."
(1 stick) butter, softened, divided
baby potatoes, halved
kosher salt
freshly ground black pepper
lemon zested and thinly sliced
chopped fresh thyme, divided, plus more leaves for serving
dried oregano, divided
bone-in skin-on chicken thighs
small red onion, halved and cut into 3/4" wedges
cloves garlic, unpeeled