Pulse 1/4 cup salt and the chile powder in a food processor until combined; let the powder settle before removing the lid, then transfer the chile salt to a small bowl and set aside.
Wipe out the food processor and add the crema, cilantro and garlic. Add the grated zest and juice of 1 lime and puree until smooth. Transfer to a small bowl; cover with plastic wrap and refrigerate until ready to serve.
Toss the mango and jicama sticks with the juice of 1 lime. Transfer to a platter along with the radishes, bell pepper and cucumber. Slice the remaining lime into wedges and add to the platter. Serve with the chile salt and cilantro crema.
Photograph by David Malosh
Courtesy of Food Network Magazine