Special equipment: pasta roller, scalloped pasta cutter
For the Corn Tortelli:
Begin by rolling out the pasta dough. Sprinkle a baking sheet with cornmeal and set aside. Cut a piece of the dough off the ball and shape into a rectangle about the size of a deck of cards. Cover the remaining dough with plastic wrap until you are ready to use it. Roll the rectangle of dough through the widest setting of the pasta machine a few times until it is smooth. Then roll it through the remaining settings to the thinnest setting. Sprinkle the sheet lightly with cornmeal, gently fold, place on the cornmeal-lined baking sheet and cover with plastic wrap. Continue rolling out the rest of the pasta.
Next, in a medium bowl mix together the drained creamed corn, mascarpone cheese, goat cheese, tarragon, and pepper. Stir to combine and set aside. In a small bowl, beat the egg with 1 tablespoon of water and set aside.
To form the tortelli, place a sheet of pasta on a dry work surface. Using a pastry brush dipped in the egg wash, brush the entire sheet of fresh pasta. Place rounded teaspoons (about 1 ounce) of the corn filling on the pasta sheet, about 2 inches apart. Carefully place another sheet of pasta over the mounds, smoothing out any air pockets and firmly sealing the pasta around the filling. Using a scalloped pasta cutter (or a sharp knife) cut the pasta into small squares. Transfer the Tortelli to the cornmeal-lined baking sheet. Continue forming the remaining tortelli.
To make the Tarragon Butter: In a medium bowl, gently mix together all the ingredients.
To serve, place the Tarragon Butter in a large serving bowl. Bring a large pot of salted water to a boil over high heat. Add the pasta and cook until they float, about 2 minutes. Drain pasta, using a large mesh strainer or slotted spoon, into the bowl with the Tarragon Butter. Toss to coat. Sprinkle with Parmesan and serve immediately.
Place the flour in a food processor. In a small bowl, lightly beat the eggs. Add the salt and olive oil to the eggs and stir to combine. Add the egg mixture to the food processor. Pulse to combine the ingredients, scraping down the sides once or twice. Continue, with the machine running, until the liquid is evenly distributed, about 1 minute. The dough should stick together if pinched between your fingers. The dough will be cornmeal-yellow in color. Some of the dough will be sticking together, but it will not form a single ball.
Turn the dough out onto a lightly floured surface. Press the dough into a ball and knead gently until the dough is smooth. Cover with plastic wrap and let rest for 30 minutes.
Roll out the dough to your desired shape.