Ingredients

1 onion (chopped)
1 cup chicken stock
1 tablespoon all-purpose flour
1 1/2 tablespoon chili powder
2 teaspoons ground cumin
3/4 teaspoon garlic powder
1/2 teaspoon crushed red pepper
1/4 teaspoon salt
15 ounce can unsalted tomato sauce
3 cups shredded skinless (about 15 ounces, boneless rotisserie chicken breast or pre-cooked and shredded chicken breast)
15 ounce can black beans (rinsed and drained)
12 inch corn tortillas (6-)
Cooking spray
3/4 cup Mexican blend cheese (shredded)
1 large tomato (chopped)
1/4 cup fresh cilantro (chopped)
6 tablespoons sour cream (if desired for garnish)

1 onion (chopped) 1 cup chicken stock 1 tablespoon all-purpose flour 1 1/2 tablespoon chili powder 2 teaspoons ground cumin 3/4 teaspoon garlic powder 1/2 teaspoon crushed red pepper 1/4 teaspoon salt 15 ounce can unsalted tomato sauce 3 cup s shredded skinless (about 15 ounces, boneless rotisserie chicken breast or pre-cooked and shredded chicken breast) 15 ounce can black beans (rinsed and drained) 12 inch corn tortillas (6-) 3/4 cup Mexican blend cheese (shredded) 1 large tomato (chopped) 1/4 cup fresh cilantro (chopped) 6 tablespoons sour cream (if desired for garnish)

Preheat broiler to high. Combine first 9 ingredients (through sauce) in a medium saucepan and stir with a whisk. Bring to a boil over medium- high heat. Cook 2 more minutes or until thickened, stirring occasionally. Reserve 1 1/2 cups sauce mixture on the side.
Add chicken and beans to pan; cook 3-4 minutes or until chicken is thoroughly heated.
Stack 6 tortillas and wrap stack in damp paper towels and microwave for 15 seconds. Spoon about 1/3 cup chicken mixture in center of each tortilla and roll up. Arrange tortillas, seam sides down, in bottom of a 13 x 9-inch glass or ceramic baking dish coated with cooking spray. Repeat with other 6 tortillas starting with the stacking step.
Top with reserved sauce and cheese. Broil 3-4 minutes or until cheese is lightly browned and sauce is bubbly. Top with tomato and cilantro. Garnish with sour cream if desired.