Cut the chicken breast into bite-sized pieces.
Dice the tomatoes and onion.
Mince the garlic.
Heat olive oil in a pan and sauté the garlic.
Add the chicken breast and stir-fry until the surface is cooked.
Add the onion and tomatoes and sauté together.
Season with salt and pepper, then simmer over medium-low heat for 15 minutes.
Transfer the finished stew to a bowl.