Cut the chicken breasts into 1/4-1/2 inch cubes. Toss in a mixing bowl with the taco seasoning. You could certainly use cooked and shredded chicken too.
In a medium skillet, saute the chicken pieces in oil with the diced peppers.
Cut the avocado into 1/4-1/2 inch chunks and toss with the cooked chicken and peppers. Place into the taco shells and top with lettuce, and tomatoes. (Optional: Add shredded cheese and/or sour cream.)
Cook the frozen corn as directed on the package.
Serve Avocado Chicken Tacos with Corn.