Name: Southwest Lasagna
Ingredients: Cooking spray; 1 Tbsp. canola oil; 1 onion, diced; 1 red pepper, diced; 4 cloves garlic, minced; 4 tsp. chili powder; ½ cup whole wheat flour; 3 cups unsalted chicken stock; 2 (15 oz.) cans black beans, rinsed and drained; 1 ½ cups no salt added diced tomatoes; ½ cup plain nonfat Greek yogurt; 1 (7 oz.) can diced green chilies, drained; ¾ tsp. salt; 2 lbs. shredded chicken; 12 (6-inch) corn tortillas, cut in half, divided; ¼ cup sliced ripe black olives, divided; 1 cup shredded Colby Jack cheese, divided