How to Make It
In a large shallow glass or ceramic dish, spread the scallop slices in a single layer. In a small bowl, combine the celery, kumquat, onion, lime juice and olive oil and season with pepper. Mix well and spoon the lime marinade over the scallops. Cover and refrigerate until the scallops start to turn opaque, at least 1 hour or for up to 4 hours.
Add the cilantro and chives to the scallops and toss. Season with salt. Arrange the ceviche in a shallow bowl or platter and serve with the toasted bread.