Mix pecorino, ricotta, nutmeg, black pepper and orange zest in a bowl.
Heat a sauce pan over medium heat and add butter and rosemary. As the butter melts it will start bubbling and changing color from light yellow to golden and lastly brown. The mik solids will start to separate from the fat and will form a dark brown sediment. When this happens and the butter is brown with a nutty smell, pour the butter to a cold bowl. If you prefer to remove the sediment pour the butter in the bowl slowly, leaving the sediment in the sauce pan. Remove the rosemary.
Cut pasta into 8 pieces and roll each one out as thinly as possible using a little flour to prevent sticking. You can use a rollin pin (the more labor intense method) or use a pasta machine (the easier method) and roll the dough starting at the thickest setting, continuing to the thinnest setting that the dough can still handle. If it starts tearing you should stop one setting thicker. I suggest running a test with a tiny portion of the dough before going full scale.
There are many shapes of raviol. The easiest is a simple square or rectangle. Spread a heap teaspoon of filling 4 cm apprart over the lenght of a rolled out pasta. Using a brush or a finger lightly wet one long edge of the dough and the part between the filling. Fold over one half of the dough lenghtwise and press around the filling to get all the air out. Using a pasta cutter or a sharp knife cut rigth in the middle between the filled parts and use a fork to press around each ravioli, so the dough really sticks together and doesn't open during cooking.
Boil water and add salt like for any other pasta, then add the ravioli and cook for about two minutes.
Recipe by Anja Burgar | Use your Noodles | www.useyournoodles.eu