3 cups all-purpose flour plus additional for dusting
4 large eggs, lightly beaten
Â¼ cup fresh spinach juice
1 teaspoon salt
Â½ cup parmesan, grated fine
Â½ cup pecorino Romano, grated fine
Â¼ cup ricotta cheese
Mound flour on a work surface, preferably wooden, and make a well in center. Add egg, spinach juice and salt. With a fork, gently beat eggs and water until combined. Gradually stir in enough flour to form a paste, pulling in flour closest to egg mixture and being careful not to make an opening in outer wall of well. Knead remaining flour into mixture with your hands to form dough, adding more water drop by drop if dough is too dry (dough should be firm and not sticky). Knead dough until smooth and elastic, 8 to 10 minutes. Cover and let sit for 30 minutes.
Divide dough into 8 pieces, then flatten each piece into a rough rectangle and over rectangles with an inverted large bowl. Set rollers of pasta machine on widest setting. Follow directions on pasta maker to roll out into flat sheets.
In a medium mixing bowl combine the three cheeses and mix well. To assemble ravioli cut the fresh pasta sheets cut into about 2 square inches, add 1 dollop of filling. Cover with another 2 inch pasta square. Using wet fingers seal all sides of ravioli by pinching down. Place raviolis in a large pot of salted boiling water. Boil for about 3 minutes, or until floating.
Strain and dollup with butter.