To a stand-up mixer, with the paddle attachment, add the flour and cornmeal. *You can absolutely do this with a big bowl and a fork, too.* Adding one ingredient at a time, add the egg yolks, oil and water, adding the water, one tablespoon at a time, until the dough comes together.
When the dough turns into a somewhat cohesive ball, turn the dough out onto a lightly floured work surface and knead it until it feels silky smooth, about 5 minutes. The dough is ready if when you stretch it with your hands, it gently pulls back into place.
Shape the dough into a ball then flatten the ball into a disk. Cover the dough and transfer to the fridge for at least 30 minutes.
When the 30 minute is up, remove the ball of dough from the fridge and cut it up into 4 pieces. Let the pieces come to room temperature slightly, being sure they’re covered with a clean kitchen towel as to not dry out.
Roll them into a long oval strip, and then run it through the pasta machine at it’s largest thickness setting (#5). Flip it on the opposite side, flour that side a bit and run it through again. Repeat this, decreasing the size each time (#4, #3 and then finally to #2). I found that #2 was the perfect thickness (1/8-inch thick) for ravioli.
To the first sheet of pasta, add half of teaspoon worth of filling, spacing them about 2-inches a part. Brush the edges of the pasta with a teeny bit of water. Lengthwise, fold over the sheet of pasta and seal on the sides. Using your ravioli stamper, stamp out ravioli shapes. I used this round stamper. Repeat with the remaining balls of dough until you’ve worked your way through all of it. Transfer to a baking sheet dusted with flour and place in the fridge until you’re ready to use it.
If you’d like to freeze some of it, easy! Simply place it on a baking sheet, in one even layer, and transfer to the freezer. When cold to the touch, about 30 minutes, transfer to an airtight freezer-safe container or bag. Cook straight from frozen in sauce or in a pan.