In a cast iron skillet add olive oil and set to medium heat. Cook chicken tenders until done in center. Dice chicken and add to a large bowl. May replace with rotisserie chicken if you don't want to cook or grill the chicken. 

Cook pasta as directed on the box and drain. Place pasta into the bowl with the chicken. Pour in beans (do not drain beans). Add in diced onion and tomatoes. Shake the taco seasoning over the top and toss the entire mixture well. 

Add in avocado and cheese. Toss lightly. May serve hot or cold.