Preheat oven to 400 degrees F. Lightly oil a large cast iron skillet or coat with nonstick spray.
In a large bowl, combine corn, mayonnaise, Sriracha, sugar, ¾ teaspoon salt and ¼ teaspoon pepper. Stir in 4 ounces mozzarella, about half.
Spread corn mixture into the prepared skillet; sprinkle with remaining mozzarella.
Place into oven and bake until bubbly, about 15 minutes. Then broil for 2-3 minutes, or until golden brown.
Serve immediately, garnished with green onions, if desired.
