How to Make It
Heat oil in a small saucepan over medium. Sprinkle flour over pan; cook 30 seconds, stirring constantly. Slowly add stock; cook 2 minutes or until thickened, stirring frequently. Remove pan from heat; stir in spinach, hot sauce, salt, pepper, chicken, and cheese.
Heat a large skillet over medium. Divide chicken mixture evenly over half of each tortilla. Fold tortillas in half over filling. Carefully coat both sides of quesadillas with cooking spray. Add 2 quesadillas to pan; cook 2 minutes on each side or until browned and cheese is melted. Repeat with remaining quesadillas. Cut each into 4 wedges. Serve with avocado.