Cook quinoa as directed on package.

While quinoa is cooking, spray skillet with cooking spray and heat over medium. Cut chicken into cubes and add to heated skillet along with taco seasoning; stir to coat evenly. Cook for 6-8 minutes or until no longer pink inside.

Toss chicken with cooked quinoa and divide amongst 4 bowls. Top immediately with cheddar cheese.

Rinse and drain beans, chop lettuce and tomatoes, and slice avocado. These toppings can be added to a large platter along with the remaining toppings for a self-serve taco bowl.

Serve mango on the side.