*1. If you prefer thickened balsamic simply pour the balsamic in a pan & bring it to a simmer at medium heat, then reduce the heat to low & let it simmer for 10-15 minutes until thickened.
*2. This keeps the potato from drying out.
*3. You can test this with a knife.
*4. The amount of flour will vary depending on the size of your potato, the moisture from the towel, & the egg. Also, try not to overwork your dough so that your gnocchi stays light & airy.
*5. Total cooking time is about 5-7 minutes.