Preheat oven to 450°F.
Spray a 12 cup muffin pan with nonstick cooking spray. Sprinkle a small amount of cornmeal in the bottom of each cup. Set aside.
In a small skillet, heat 1-2 teaspoons olive oil over medium heat. Add the chopped onion and sauté, stirring occasionally, until tender and browned.
In a medium mixing bowl, combine the chicken, sautéed onion, cilantro, bbq sauce, and ketchup. Mix well.
Unroll the dough and divide into 12 equal portions. Press the dough into the bottom and up the sides of each muffin cup.
Fill each dough cup with a spoonful of the filling, dividing it evenly among all 12 cups. Sprinkle each with shredded cheese.
Bake at 450°F for 10-12 minutes, until cheese is fully melted and edges are golden brown.
Remove from oven and garnish with cilantro as desired.