Add the diced peppers and cook them with the onion. Add the chicken sliced into strips and the diced zucchini and continue cooking, stirring occasionally, until the chicken is golden brown. Season with salt and pepper and add the rosemary.
3.
Add the hazelnuts and chicken broth, cover and cook over medium-low heat for about 15 minutes until the sauce reduces.
4.
If you’d like a thicker sauce, remove some of the hazelnut broth, blend it completely and add it back to the pan. If need be, you can also add a teaspoon of cornstarch.