Preheat the oven to 375F. Poke the potatoes with a fork, and bake for 40-50.
Peel, then mash, mill, or food process.
Add the parmesan, nutmeg, cinnamon, and season well with salt and pepper. Taste the filling and adjust seasoning. This is what your ravioli will taste like.
Fill each wonton or gyoza wrapper with 2-3 teaspoons of the filling. Brush the edges lightly with water using your finger. Fold them in half, and then press them firmly to seal.
Bring a pot of water to boil to cook the ravioli.
In the meantime, melt 2 sticks of unsalted butter in a medium saute pan over medium heat and cook until the foam subsides and the butter begins to brown, 3 to 4 minutes. Remove from the heat and cool for 1 minute. Then stir in the half of the tarragon with stems, and season with salt and pepper to taste.
Drop the ravioli into the boiling water and cook for 3-5 minutes. You can do this in batches.
Strain the ravioli and add to the brown butter sauce over medium heat. Toss to coat and serve immediately with the rest of the fresh tarragon.
Video
Notes
It is VERY important to taste the sweet potato filling before using to make the ravioli. Sweet potatoes can be very sweet, and adjusting the seasoning of the filling at this step is very important for a successful dish.I like to buy wonton or gyoza wrappers in bulk and freeze them. Simply defrost overnight (or even up to a week in advance) in the refrigerator.