Start by adding the sweet potatoes to a baking tray. Using a fork, prick the potatoes to allow the moisture to escape whilst baking. Pop in the oven for 35 minutes.
Remove from the oven and set aside for 5 minutes before removing the skin. Then, add the potato to a large mixing bowl and mash until smooth. Season with salt.
Mix the egg into the bowl until combined. Then, slowly stir the flour into the bowl. Once roughly combined, transfer the dough to a flour dusted surface. Dust your hands with flour and start to knead the dough for around 15 seconds (we don’t want to over-knead)! If you find the dough is too sticky, add more flour.
Slice the dough into 4 chunks and use your hands to roll the piece of dough into a long tube. If you find the tube is getting too long, slice it in half and work with one piece at a time. Dust the surface as you go.
Slice the tube into small gnocchi ‘pillow’ pieces then place on a floured tray. From here, I froze ⅔’s of the batch.
Add the gnocchi into salted boiling water. When the gnocchi rises to the top, remove from the water and add to a bowl.
Next, add the rapeseed oil to a non-stick frying pan on a high heat. Once hot, pour the gnocchi into the frying pan along with the cavolo nero. Distribute across the pan and leave to fry for around 3 minutes, or until golden brown on one side, then rotate. Season with salt.
When the gnocchi & cavolo nero is nice and crispy, reduce the heat and stir the butter, garlic and thyme into the pan. Continue to heat for a couple of minutes and then serve with a sprinkle of parmesan.