When you're ready to make your agnolotti, take the dough and separate it into about four parts (this number doesn't really matter - you're just using smaller amounts to help you roll the pasta).
Again, if you have a pasta-rolling extension on your stand mixer, go ahead and use it. If you're low tech like me, get out your rolling pin and get to business.
On a clean, well-floured surface, roll your dough out until it is fairly thin. For a reference point, please refer to the photos!
To get the round agnolotti shape, take a standard size mason jar lid (which is what I used) or a similarly-sized glass and cut out your shapes. A cookie cutter would probably work too.
When you've cut as many circles as you can out of the dough you've rolled, repeat the process with the remaining dough. Save the dough you have leftover from each repetition, and at the end, add a little water to reconstitute the dough, and roll it out again so nothing is wasted!
To make your agnolotti, scoop about a scant 1/2 tbs of the filling in the middle of your little pasta circle. Using a clean paintbrush or your finger, dab a little olive oil around the circumference of the circle.
Fold circle in half over the filling. Using a fork, press the tips of the fork down on the edges of the half-circle, to "seal" the agnolotti. For reference, please see photos!
Repeat until out of pasta dough or filling.