Bake the yams for 30 minutes at 350°F. Set aside and let cool.
After they cool down peel them and mash them.
Add the yams, flour, salt and pepper and form a dough. If necessary add more flour until it doesn’t stick to the fingers. Cut and make rolls with the dough. Cut in 1 inch pieces and put them through a fork. Toss them in batches in a pot with salted boiling water. Cook for 3 minutes until they float.
Take them out with a skimmer and set aside.
In a pan, brown the butter until toasted, add the chopped nuts and the gnocchi.
Mix and finish with grated zucchini on top.
Garnish with fresh parmesan cheese or emmental cheese.