Set your oven to 350 degrees.
Combine the chili powder, garlic powder, and onion powder in a mixing bowl.
Drizzle some olive oil on the chicken and season with the spice mix. A pinch or two would be enough. Set aside the rest.
Bake the chicken breasts on a baking sheet, for approximately 25-30 minutes.
Shred the chicken into small pieces with a fork.
Heat some oil in a pot. Add the diced peppers, along with the rest of the spice mix.
Follow by adding the chicken stock, canned tomatoes, beans, tomato paste, and the chicken pieces.
Let it simmer for about 30 minutes.
In the meantime, combine the cornmeal and water, and pour the mixture into the chicken soup.
Let it simmer for an additional 30 minutes.
Remove from the heat and let it cool.
Just before serving, chop the tortillas into small pieces and gently stir them into your soup.