Make the salsa: In a large bowl, combine the peaches, cucumber, red onion, jalapeno, cilantro and lime juice and season with salt and pepper. Cover and refrigerate until ready to serve.
Make the fish: Season the mahi mahi with salt and pepper. Heat the olive oil in a nonstick skillet over high heat. Sear the fish until opaque in the center, 3 to 4 minutes per side, depending on the thickness. Transfer the fish to a platter and top with some of the salsa. Serve any extra salsa on the side.
Photograph by David Malosh
Recipe from Endless Summer cookbook. Copyright (c) 2015 by Katie Lee. Published by Stewart, Tabori & Chang, an imprint of Abrams.