Salt + Vinegar roasted potato slices ~ can't wait to try these - sounds delish!!! Salt and Vinegar Broiled Fingerling Potatoes. Cut 1 lb. potatoes lengthwise and boil in 2 cups vinegar until tender. Drain well & pat dry. Toss with olive oil, pepper and kosher salt to coat. Finish on grill or under broiler til browned, flip and broil other side.