1. Mix the spices. In a bowl combine the chili powder, paprika, cayenne and a pinch of salt.
2. Heat the olive oil in a pan over medium-high heat. Add the onion and cook until soft, 5 minutes. Add the corn and spice mix. Cook until the corn is softened, 5 minutes.
3. Combine half the cotija, lime juice, mayo, sour cream, & Greek yogurt in a bowl.
4. Once cooled, combine sour cream mixture with the corn and onion.
5. Char one ear of corn, mix half into the mixture & set aside other half to garnish on top.
6. Fold in the chopped cilantro & transfer to plating bowl.
7. Garnish with cilantro leaves, charred corn pieces and the rest of the cotija.
8. Serve with pita, grilled chicken skewers & assorted crudité.