"You won't find them on the menu anywhere...."
frozen corn
shredded Monterey Jack cheese, divided
chopped white onion
cotija cheese, crumbled, plus more for serving
mayonnaise
lime juice, plus wedges for serving
small jalapeño, seeded and minced, plus more, thinly sliced, for serving
chili powder
Kosher salt
Freshly ground black pepper
(10-oz.) can green enchilada sauce
corn tortillas
Cilantro, for serving