Cut the dough into 4 pieces. Flour the work surface and the rolling pin with cornstarch. You can either spread the dough directly on a floured wooden worktop or on floured baking paper.
Spread the dough very, very thinly, it must be transparent. Then, using a ravioli tin (or a large glass or a round cutter), cut the dough into discs. Collect the remaining pieces of dough to form a new ball of dough.
Place a disc of dough on the mould. Put a little stuffing in the centre (spreading it rather in the direction of the fold), brush the edges of the disc with water (or egg yolk) to weld them well, then close the mould and press.
Do the same with all the discs! Be careful not to let the dough dry, it is better to do them while your dough is fresh. The ideal is to do it with 2 or more people to be quicker!
Cook the ravioli for 8 minutes in a pot of boiling water (you probably won't be able to cook your 40 ravioli all at once so do it in several times :)). You can taste one ravioli to check the cooking time, which depends on the thickness of your dough. Serve with parmesan shavings, fresh basil, or a butter and sage sauce.