Heat a grill or grill pan to high heat. Husk and clean each ear of Corn (4 ear). Rub them with Olive Oil (1 tablespoon) and season with Salt and Pepper (to taste).
Roast ears over medium high heat, turning regularly, for about 20 minutes or until evenly blistered. Set aside to cool.
While the corn roasts, prep the vegetables. Give a small dice to the Jalapeño Pepper (1), Red Onion (1/2), Roma Tomato (1) and Red Chili Pepper (1/4 cup). Finely chop the Fresh Cilantro (1/4 cup).
When the corn is cool enough to handle, slowly cut the kernels off the cob over a large bowl or cutting board. Be warned that kernels will want to fly, so cut slowly. Combine roasted kernels with the other chopped vegetables and Ground Cumin (1/4 teaspoon), Ground Coriander (1/4 teaspoon), and Cayenne Pepper (1/4 teaspoon).
Add the Greek Yogurt (1/4 cup), Lime Juice (1 tablespoon) and Salt and Pepper (to taste). Mix everything together.
Serve at room temperature or cold.