Preheat your oven to 350℉.
In a skillet, heat the olive oil over medium heat. Sauté the white and light-green parts of the scallions with kosher salt until softened, about 2 to 3 minutes.
Stir in the corn and Tajin seasoning, sautéing until the corn starts to soften, about 3 to 5 minutes.
Add the cream cheese and stir until fully incorporated.
Fold in the light sour cream and three-fourths of a cup of Cotija cheese. Transfer to the oven and bake until bubbling and browning, about 10 to 12 minutes.
Sprinkle the remaining Cotija over the top and broil until browned, about 2 to 3 minutes.
Garnish with reserved scallion greens and chopped cilantro. Serve immediately with tortilla chips or fresh veggies.