Place tortillas on ungreased baking sheets; spritz both sides with cooking spray. Place on ungreased baking sheets. Bake at 350° for 7 minutes; turn and bake 3 minutes longer or until crisp. Set aside.
In a food processor, process the beans until smooth. In a large saucepan, combine the beans, 1 teaspoon chili powder, 1/2 teaspoon cumin and salsa; bring to a boil. Remove from the heat; set aside.
Sprinkle chicken with remaining chili powder and cumin. In a large skillet coated with cooking spray, cook chicken over medium heat for 5 minutes or until chicken juices run clear, stirring constantly.
Spread bean mixture over tortillas to within 1/2 in. of edges of tortillas. Top with the chicken, tomatoes, onion and cheese. Bake at 350° for 2 minutes or until cheese is melted. Top with romaine. Garnish with sour cream if desired.
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