Sheet-Pan Lemon Butter Chicken Thighs

Name: Sheet-Pan Lemon Butter Chicken Thighs
Cook time: 1 h 25 min
Total time: 1 h 25 min
Cuisine: American
Ingredients: 1/2 c. (1 stick) butter, softened, divided; 1 1/4 lb. baby potatoes, halved; kosher salt; freshly ground black pepper; 1 lemon zested and thinly sliced; 4 tsp. chopped fresh thyme, divided, plus more leaves for serving; 1 1/2 tsp. dried oregano, divided; 2 1/2 lb. bone-in skin-on chicken thighs; 1 small red onion, halved and cut into 3/4" wedges; 5 cloves garlic, unpeeled