Grill the peach wedges. maitake mushrooms and ears of corn in a grill pan until they have grill marks on all sides. Set aside in a separate bowls.
Sauté the onion in a drizzle of coconut oil until softened. Add the garlic and tomato paste and cook for a couple of minutes. Add the chili powder, paprika, cayenne, oregano and cumin. Add the beans, water and epazote. Cut the grilled peaches into a large dice and add them, and their grilling juices that collected in the bowl to the beans. Bring to a slow simmer and cook until the liquid has reduced and the beans have a nice thick consistency. Season with salt and pepper.
Serve on warmed corn tortillas with a slice of the grilled corn, a few pieces of grilled maitake and a sprig of cilantro.