Poke holes all around the potato using a fork.
Wrap the potato in a damp paper towel, then place on a dish or a shallow bowl.
Microwave the potato for 9-10 minutes, or until the potato is squishy and soft like a baked potato. Time will vary depending on potato size.
Scoop out the inside of the potato into a large bowl and discard the skin.
Add the cracked egg and the flour to the bowl, then mix with a spoon into a shaggy dough.
With clean hands, shape the dough into a circle. It will seem really dry, this is okay!
Move the dough to a clean, floured surface and cut into eight pieces. You can do this by cutting the circle in half, then the pieces in half, then those pieces in half.
Roll each piece into a sphere. The dough will start to form nicely into a smooth dough.
Roll out each sphere with your hands into long logs. They should be about the width of your pinky.
Using a pizza cutter (or a knife), cut 1-inch long gnocchi pieces from the logs.
If desired, form the pieces into dumplings, then press them into the back of a fork to give them that fun, gnocchi design.
Bring a pot of water to boil. Cook the gnocchi pieces in small batches at a time for 1 minute each, or until the gnocchi start to float. Take them out with a slotted spoon and move them to a bowl.
Once all boiled, turn on a skillet and cook the gnocchi in whatever sauce your heart desires, or simply with some butter or olive oil. See in Recipe Notes for a list of easy sauce options.