Preheat the oven to 350°F.
Spray a 9x13-inch baking dish with nonstick cooking spray.
In a large mixing bowl, combine the green enchilada sauce, sour cream, mayonnaise, Tajín, Monterey Jack cheese, Mexican Style Street Corn, and shredded rotisserie chicken.
Stir until everything is evenly combined.
Arrange a layer of the quartered mini corn tortillas across the bottom of the prepared baking dish.
Spread the chicken and street corn mixture evenly over the tortillas.
Top with another layer of the quartered tortillas.
In a separate mixing bowl, combine the Southwest corn, ¼ cup plus 2 tablespoons mayonnaise, and the remaining Monterey Jack cheese.
Spread the corn mixture evenly over the top layer of tortillas.
Cover the baking dish tightly with aluminum foil.
Bake for 20 minutes.
Remove the foil and continue baking for an additional 10 to 15 minutes, or until the casserole is hot and bubbly and the cheese is melted.
Let the casserole rest for 5 minutes before serving.