Cook the gnocchi in salted water according to the instructions on the packet (if you like, you can add two fingertips of thyme to the salted water). Then pour off through a sieve.
Put the gnocchi in a small baking dish and spread the defrosted spinach over it. Crumble the feta cheese over it and mix everything once with a spoon. Now spread the grated cheese over it.
Cook in a preheated oven at 225 ° C to 250 ° C for about 25 minutes. Serve hot.
The gnocchi a la Spinachi are also very suitable as a side dish, e.g. with Wiener Schnitzel.