A friend once said to me, "If you ever want to confirm the existence of miracles, just look at a sliced red onion." I immediately fell for the idea that, when paid the proper attention, a fruit or vegetable could be so extraordinary — so arresting in its beauty — that it evokes a sense of the sacred. After that, I started noticing "miracle produce" everywhere, from Romanesco cauliflower with its fractal-shaped florets, to the thin fuchsia rings of a chioggia beet, and, most recently, blood oranges. Outside, a blood orange looks like any other thick-skinned navel, with just the slightest blush indicating that something special might be hiding inside. But slice it open, and the shock of glistening, sunset-stained flesh feels nothing short of miraculous.