1. Mix together the sweet potatoes and mashed potatoes until smooth, then add egg, Parmesan cheese, salt and flour. Mix with a spoon and then knead until a soft dough forms. Gradually add additional flour until the dough is no longer sticky. Depending on the moisture level of your potatoes and egg, you may have to add more flour, but make sure the dough is soft and not dense.

2. Divide dough into four equal pieces. Using your hands, roll out each piece into long skinny rolls. Cut off small parts of the dough to form little pillows. Place the gnocchi on a parchment lined baking sheet.

3. Add butter to a large sauté pan over medium heat. Working in batches, place gnocchi into pan and cook 1-2 minutes until brown on each side, turning once. This makes the gnocchi crispy on the outside and soft on the inside. Serve with your favorite sauce or add to soup or salad.