Cut the chicken breast into bite-sized pieces.
Dice the onion, carrot, and potato.
Heat olive oil in a pan and sauté the chicken breast.
Once the outside of the chicken is cooked, add the vegetables and stir-fry.
Add water and tomato sauce and bring to a boil.
Season with salt and pepper.
Simmer over medium heat until the vegetables are cooked through.
Serve the finished stew in a bowl.