(Optional) Preheat oven to broil on high (550 degrees F)
In a large skillet, melt butter over medium high heat. Then add frozen corn kernels and a diced and de-seeded jalapeño, and cook, stirring occasionally, until the corn is cooked through and slightly charred, about 8-10 minutes. Look for the golden char on the kernels
Remove corn from heat, and pour into serving dish. Stir in mayonnaise, cotija, cilantro, chili powder, garlic and lime juice.
Serve immediately, or top with queso fresca and mozzarella, and broil until golden and bubbly.
Garnish with additional cilantro, and cotija, and lime zest
Serve with corn chips or tortilla chips.