Boil fusilli until cooked. Wash and boil the chicken breast.
Add the vegetable oil in the frying pan, sautethe onions. Then add the chicken breast, chopped into cubes, to the onion and add 1 glass of broth, in which fusilli were cooked.
Add salt, pepper, cover and simmer for 15 minutes. When the breasts are ready, put fusilli in the pan.