Potato Pierogi with Sautéed Cabbage and Apples

재료

1 16.9-ounce box frozen potato-and-onion pierogi 1 16.9-ounce box frozen potato-and-onion pierogi

1 tablespoon olive oil 1 tablespoon olive oil

1 small yellow onion, cut into rings 1 small yellow onion, cut into rings

1 crisp apple (such as Braeburn or Gala), cut into 1/2-inch pieces 1 crisp apple (such as Braeburn or Gala), cut into ½-inch pieces

1/4 small head green cabbage, shredded ¼ small head green cabbage, shredded

1 tablespoon apple cider vinegar 1 tablespoon apple cider vinegar

kosher salt and black pepper kosher salt and black pepper

1/3 cup sour cream ⅓ cup sour cream