
Season chicken with salt and pepper, to taste; set aside.
Heat olive oil in a large skillet over medium high heat. Add garlic and shallot, and cook, stirring frequently, until fragrant, about 2 minutes.
Stir in chicken and barbecue sauce, and cook, stirring frequently, until golden brown and the sauce is slightly reduced, about 3-5 minutes; set aside.
Preheat oven to 400 degrees F. Lightly oil a baking sheet or coat with nonstick spray.
Place potato chips in a single layer onto the prepared baking sheet. Top with barbecue chicken mixture and cheeses.
Place into oven and bake until heated through and the cheeses have melted, about 5-6 minutes.
Serve immediately, topped with tomato, onion, sour cream and cilantro.