Cheese Ravioli FillingJuly 22, 2025 Ingredients 1½ cups ricotta or cottage cheese ¾ cup freshly-grated Parmigiano Reggiano 2 tsp finely-chopped onion 1 egg 1½ tsp salt Photo: Famartin / Wikimedia Commons / CC BY-SA 4.0Procedure Stir all the ingredients together in a bowl. Set aside while you roll the dough.