Put the butter in the saucepan, sauté the chicken until golden, and pour over the brandy. Once the alcohol has evaporated, remove the chicken from the pan. Add the mushrooms, stir fry for a few minutes, and then add the wine. Return the chicken to the pan, add the tomato paste, salt, pepper, water, and simmer for 45-50 minutes. Serve sprinkled with parsley.