Heat the olive oil in a large skillet on medium-high heat. Add the chicken and fry it for about 5-7 minutes, until golden and cooked through. Season with salt and pepper.
Remove the chicken from the skillet and set aside. In the same pan, add the zucchini and peppers and fry for another 5 minutes. (Add a little oil, if needed).
Add 1 tbsp. of pesto to the veggies and mix well. Move the veggies to the side, and bring the chicken back to the pan. Add the remaining 1 tbsp. of pesto to the chicken and mix. Garnish with chopped parsley.