An excellent opportunity to diversify your menu for a picnic or cottage, the sauce can be prepared in advance at home, if this is not possible in nature.
For the sauce, heat a little olive oil in a small saucepan. In a food processor, chop the onion, garlic and celery into a paste. Fry this mixture in a saucepan.
Add oregano, tomatoes, finely chopped basil, salt and pepper to taste. Bring to a boil and cook for a few minutes.
If the fillet pieces are too large, then cut them lengthwise. Place in a marinating container, sprinkle with salt, pepper, thyme and drizzle with oil. Grate well and leave to marinate.
Fry the chicken on the grill or on the grill on both sides.
Put the chicken, sauce and sprinkle with grated parmesan. Enjoy your meal!