Heat oven to 350°F. Spread plantain chips in even layer covering 12” pizza pan or shallow baking dish. Top with ½ cup cheese.
Stir together beans, chiles and adobo sauce, smoked paprika, lime zest, lime juice and ¼ cup cilantro in medium bowl. Spoon bean mixture evenly over chips. Top with chicken, half of pimientos and remaining 1 cup cheese.
Bake until heated throughout, 15 minutes. Top with avocado, jalapeños, remaining pimientos and remaining cilantro. Serve with sour cream if desired.