Summer fruits and chicken in a creamy sauce may sound surprising, but the flavor is delicious and the dish is stunning. Scatter chervil leaves decoratively to garnish.
Rinse the chicken well and pat it dry. Cut each chicken breast in half along the breastbone line. Remove the fillets (the finger-size muscle on the back of each half) and reserve them for another use. Flatten each breast half with the flat end of a meat pounder until thin.
Heat the oil in a large skillet, add the breasts, and cook over medium heat until they ar