Last night my MIL taught me how to make gnocchi. There isn't much of a "recipe" but I'll do my best.
5 medium potatoes - she used Ukon Gold
About 1 1/2 cups of flour - you want to eye it and just add flour as needed
Salt and water to boil
Boil (the same way you would for mashed) the potatoes well in advance - they must be cold before you start the process. Grate the potatoes after they have cooled. Dump the flour on the counter and make a well. Put the potatoes in the well. Then break one egg in the middle. Combine just to incorporate - don't over mix. Add flour as need - dough shouldn't be dry, but you also don't want it sticking to your hands. DON'T ADD SALT! If you add salt to the dough, it will fall apart in the water. This was a point she stressed more than once.
Once everything is incorporated, divide the dough into small balls and then roll out into "snakes". (Experiment with the flour here - we found that too much flour made the dough difficult to roll.) You can make your snakes as small as you want - the thinner the snakes, the smaller the gnocchi - I like them small. Cut the snakes into pieces the size you want - I would say about 1/4 - 1/2 long. You can then roll the gnocchi pieces on a fork or a gnocchi board, if you have one, just to make the class gnocchi "imprints".
Boil your water and add a lot of salt. MIL probably put in a good 1/4 cup...seriously. Pop your gnocchi into the boiling water. When they rise to the top, they are done. Remove them from the water, put them into the serving dish and immediately top and coat with butter so they don't stick. MIL served them with ragu last night, but you can also just do butter and cheese, or an alfredo sauce...it's up to you. Enjoy! They are yummy!!!