1 Thinly slice the chicken breasts and fry them in an oiled pan, turning them over. Season with salt and pepper and leave to cool.
2 Pour the lemon juice and the cherry tomatoes into the same pan, sauté until the skin bursts. Remove from the pan
3 Peel the garlic. Wash, dry, peel the basil and mix it with the pine nuts, garlic and Parmesan cheese pieces. Add oil in a thin stream until you get a thick paste. Salt
4 Cook the penne in boiling salted water, drain them quickly. Pour them into the pan over medium heat, adding the chicken and pesto. Mix and pour in the tomatoes, stir and serve immediately.