Bright, crunchy and so ready for a warm Summer night, this AIP recipe is satisfyingly savory and has a real umami hit from the ume vinegar. Ume vinegar is made from umeboshi, cured Japanese plums, and is a great agent in ramping up saliva production (which is an often-forgotten and hugely important part of our digestion!). Clients following an Autoimmune Paleo diet can’t eat any seeds, legumes, grains, dairy or nightshades, so I’ve used deep red sumac* powder in place of any seedy spices to crust the tuna. Sumac is a berry common in Middle Eastern cooking, and even grows right here in New England. *NOTE: If you’re still in the restricted phase of AIP, you may want to skip the sumac altogether.