Cut the chicken breast fillets into small pieces. Heat mineral water in a nonstick pan over medium heat, add chicken, and cook for 5-7 minutes, stirring occasionally.
Peel and chop the onion, add to the pan. Cut the apple into small pieces and add to the pan. Cook for 2-3 minutes.
Season with salt and pepper. Add the tomatoes with juice to the pan. Simmer over medium heat for 5-7 minutes until the chicken reaches 74°C / 165°F internally.
Season with curry powder, soy sauce, garlic powder, oregano, and chili to taste.