open sandwich

slice of bread with meat, cheese, etc on top 单片三明治（一片面包上有肉、 乾酪等）: a Danish open sandwich 丹麦式单片三明治.

op (also Op), op art, op-ed, opacity, opague, opal, opalescence, opalescent, opaque, opaquely, opaqueness, OPEC, open, open an account, open cheque, open day, open letter, open out, open prison, open question, open to, open up, open verdict, open vowel, open-air, open-and-shut, open-ended, open-eyed, open-handed, open-handedly, open-handedness, open-heart surgery, open-hearted, open-minded, open-mindedness, open-mouthed, open-plan, open-work, opencast, opener,