In a sauce pot, heat oil. Add chicken and Hot Dog Chili Sauce. Heat and stir until well blended. Keep warm and set aside.
Assembly for 1 quesadilla: Place tortilla on griddle and grill 30 seconds. Place 1/2 cup prepared Cheese Sauce on tortilla. Top with 4 oz. of chicken and chili mixture and 1/4 cup onions. Cover with second tortilla.
Cook 1 minute. Turnover and cook an additional 2 minutes. Serve warm.