Mexican
Heat a grill or grill pan to medium-high, about 220C.
Grill the corn for 10-12 minutes, turning every few minutes, until the kernels are tender and charred in spots.
Stir together the mayonnaise and crema in a small bowl, and spread the cotija on a plate.
While the corn is hot, brush each ear all over with the mayonnaise mixture.
Roll the ears in the cotija, pressing so the cheese sticks, and sprinkle with chili powder and cilantro.
Serve right away with lime wedges to squeeze over the corn.