Green beans, crispy bits of pan-fried bacon, and tender onions all come together with sugar and apple cider vinegar for a sweet and sour side dish that takes the traditional green bean recipe our grandmother used to make and turns it on its head in the most delicious way. These green beans are the unfailing friend of any occasion, from weeknight suppers to holiday feasts. You can easily triple the batch and freeze the leftovers to have on hand for those busy days.