In a small mixing bowl, whisk together the ground cumin, paprika, garam masala, salt, and cayenne pepper. Set aside.
Preheat your gas or charcoal grill to medium-high. Meanwhile, husk the corn and remove the silks. Place the corn on the grill, close the lid, and cook until the corn is just charred and cooked through, turning every couple of minutes. This should take 10 to 15 minutes.
While the corn is grilling, melt the ghee or butter, chop up the cilantro leaves, and slice the lime in half.
When the corn is finished cooking, brush it with the ghee or butter. Liberally sprinkle the seasoning blend on all sides of the corn. Top the corn with cilantro and squeeze the fresh lime juice to finish.