This recipe is a quick version of this one by Emiko Davies. Note that you can make the filling a day ahead and then assemble the ravioli when you're ready to cook.
To make the filling, place beets in a saucepan and add enough cold water to cover. Bring to boil over medium heat and cook for 20 minutes. Add potatoes to beets, adding more water if needed to cover, and bring to boil. Boil for 20 to 25 minutes more until vegetables are tender. Drain.
While the potatoes are warm, peel them and cut into quarters. Add potatoes and beets to food processor - pulse until smooth and combined.
Heat olive oil in a skillet over medium-low heat. When warm, add smashed garlic cloves. Add beet mixture to skillet; cook and stir 10 minutes until mixture is thick and bubbly. Season to taste with salt, pepper, nutmeg and cloves. Remove and discard garlic. Allow mixture to cool completely. (You can do this a day ahead of time. Refrigerate mixture until ready to use.)
To assemble the ravioli, lay a single egg roll wrapper on a work surface. Brush edges with beaten egg. Place two heaping teaspoons of filling just off center, toward a bottom corner - be sure to leave 1/2-inch of the edge bare so that the filling doesn't spill out when cooking. Smooth filling to an even layer. Fold the wrapper into a triangle, lifting a top corner and lining it up with the opposite bottom corner. Firmly press all edges to seal. Using a ravioli sealer or the tines of a fork, press the edges again to secure the seal. Set finished ravioli aside, uncovered, on lightly floured work surface. Repeat with remaining egg roll wrappers.
Cook ravioli, no more than 6 at a time, in gently simmering, salted water until they float, 3 to 4 minutes. You'll want to gently stir the ravioli occasionally to keep them from sticking together.
While ravioli cook, melt butter in a small saucepan over medium-low heat.
When ravioli are done, transfer with a slotted spoon to serving plates. Drizzle each serving with melted butter, and sprinkles of poppy seeds and grated Parmesan cheese.
Notes
Freeze any remaining ravioli. To cook, place them frozen in simmering water until they float and the filling is heated through.