Gnocchi blu con pesto di zucchine e stracchino
old potatoes (about 1.2 kg) • potato starch (about 60 grams) • all-purpose flour (about 200 grams, as needed) • large egg • Ground nutmeg, to taste • Salt, to taste • blue pea flower powder • zucchini pesto • large zucchini • Salt, to taste • stracchino cheese (about 100 grams) • Black pepper, to taste (optional) •