Spritz Both Sides With Nonstick Cooking Spray. Place On Ungreased Baking Sheets. Bake At 350 Degrees F 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 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 Skillet Coated With Nonstick Cooking Spray, Cook Chicken Over Medium Heat For 5 Minutes Or Until 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 Degrees F For 2 Minutes Or Until Cheese Is Melted. Top With Romaine. Garnish With Sour Cream If Desired.