Place the whole breast in a pot with enough water over medium-high heat.
Add onion, salt and garlic to flavor the chicken. Cook for about 20 minutes.
Separate the chicken from the broth. Strain the broth and reserve it for the stew.
Now shred or shred the chicken, either with your hands directly or with the help of a fork. Set aside.
Chop the onion, the peppers and crush the garlic.
Place a large frying pan over medium heat, add a little oil of your choice, you can also use butter.
Now add the onion to the pan, stirring constantly so that they do not burn and until they crystallize.
Add the bell peppers, garlic, tomato and spices to taste.
Then add the larded chicken and stir.
After about 10 minutes the chicken is ready. Check if it needs a little more salt and it's ready.