Potato gnocchi are simple to make from scratch, but light-as-air results require a few secrets: use russets for a floury (not waxy) texture, then bake the spuds instead of boiling them. For even more fluff, spoon a little ricotta into the dough. While you roll, simmer the creamy tomato sauce to serve them with and dinner will be ready in no time.
If you do not have a ricer or food mill, you can grate the potato on the large holes of a cheese grater, though it will give the dumplings a rougher texture.
Freeze shaped gnocchi on a lightly floured baking sheet lined with parchment, then transfer them to a resealable plastic bag. They can be cooked straight from the freezer—it'll just take them an extra minute to rise to the top.