Season the chicken breast evenly with half of the sea salt, black pepper, and chili powder.
Heat the olive oil in a cast-iron skillet over medium-high heat.
Sear the chicken for 5 to 6 minutes per side until the internal temperature reaches 165 degrees Fahrenheit, then remove from the pan and let it rest.
In the same skillet, add the corn kernels and minced garlic, sautéing for 3 to 4 minutes until the corn is slightly charred and fragrant.
While the corn cooks, whisk together the plain Greek yogurt, lime juice, and the remaining chili powder in a small bowl to create the dressing.
Slice the rested chicken breast into thin strips or bite-sized cubes.
Remove the skillet from the heat and stir the yogurt dressing and fresh cilantro into the warm corn.
Transfer the corn mixture to a bowl, top with the sliced chicken, and finish with the crumbled Cotija cheese.