Spray large saucepan with cooking spray. Heat over medium-high heat. Add turkey, onion and pepper; cook 5 to 7 minutes or until turkey is crumbled and no longer pink, stirring occasionally.
Stir in broth and quinoa. Bring to a boil. Cover, reduce heat and simmer 15 minutes or until quinoa is tender.
Stir in beans, undrained tomatoes, tomato sauce, corn and seasoning mix; simmer uncovered 15 minutes more, stirring occasionally. Top each serving evenly with avocado and cheese.