Peel sweet potatoes, cut into quarters, and boil until tender.
Use a fork to test tenderness.
Drain water from sweet potatoes and set aside to cool.
Using a fork or potato masher, mash the cooled potatoes until smooth and chunk free.
Scoop the mashed potatoes onto a floured work surface and top with flour.
Create a well in the flour and add the egg and salt.
Use a fork to mix the salt and egg into the flour. With your hands, mix the flour and egg mixture into the mashed potatoes. Be careful not to overwork the dough.
Roll your potato dough into a log and cut it into 5 equal sections. Then roll each section into a rope and make a cut every inch to create your individual gnocchi pieces.
Lightly press on top of the gnocchi pieces with a floured fork to form an indentation. Then lightly flour each piece.
Add a dash of salt to a pot of water and bring to a boil.
Cook 20-25 gnocchi pieces at a time. Use a strainer to remove gnocchi once they float to the surface (about 2 to 3 minutes).
Continue cooking in small batches until all the gnocchi pieces have been cooked.