Step 5: Add filling and seal ravioli
If you're working by hand, place a tablespoon of the four cheese blend onto the bottom half of the pasta dough, about an inch apart from each other. You can either brush an egg wash or some water on the edges of the dough and fold the top half of the sheet over the filling.
Press the dough gently shut with your fingers and use a knife or a ravioli stamp/roller to seal the filling in. Repeat with the remaining sheets of pasta, and cover under a towel to keep the ravioli from drying out. To save time and to make the process more efficient, you can use a ravioli maker.