Cheesy BBQ Chicken Sweet Potato Nachos



1 small bag (around 5.5 ounces) your favorite sweet potato chips
2 cups cooked, diced chicken breasts
1/2 cup corn (either canned or frozen; if frozen, thawed out)
1/2 cup black beans, drained and rinsed
1/4 cup chopped jalapeños
1 1/2 cups freshly shredded American cheese
1/2 cup your favorite BBQ sauce
1/4 cup nonfat plain Greek yogurt
handful cilantro to garnish