Prep the veg - Strip the corn kernels from the cobs. Deseed and thinly slice the serrano pepper. Deseed and mince the jalapeño. Mince or grate the garlic. Chop the cilantro.
Sauté the corn - Melt the butter in a large skillet over medium high heat. Sauté the corn kernels and peppers in the butter, stirring occasionally, until cooked through. Turn up the heat to high and cook without stirring for 2 minutes to ensure a slight char on the bottom kernels. Remove from the heat and stir.
Stir together - Squeeze the lime. Stir the mayo, feta, chipotle powder, garlic, and lime juice into the corn mixture.
Garnish and serve - Garnish with chopped cilantro and serve.