Defrost the peas. For the filling, cut the cheese into 4 thick pieces. Wrap each cheese with 2 slices of ham. Wash the meat and dab dry. Cut a pocket into each fillet with a sharp knife. Spread the filling in it and stick together with 2 wooden skewers
Heat the oil in a coated pan, fry the meat well all round, then fry over a low to medium heat for a further 10-12 minutes, turning. Season with salt and pepper
In the meantime, let the spaetzle steep in boiling salted water according to the instructions on the packet, pour onto a sieve and drain. Simmer peas in boiling water for 1-2 minutes, drain and drain
In a bowl mix spaetzle and peas with pesto. Arrange chicken fillets with the spaetzle mixture