Remove from heat and let cool. After all have been assembled spread the … To assemble the spinach and ricotta cannelloni… Perfect spinach and ricotta cannelloni. In a large bowl mix together ricotta, chopped spinach, parmesan cheese, lemon zest, salt, pepper and nutmeg. To make the spinach and ricotta filling, add the ricotta, parmesan, chopped spinach, egg, nutmeg and salt and pepper to a large mixing bowl and mix everything together until creamy and thoroughly combined (photos 5&6). The filling for Cannelloni is the same as for classic Ravioli: Spinach and Ricotta. When cooled chop the spinach. But as for Ravioli, you can also stuff the Cannelloni with whichever filling you’d like. When all sheets are filled place a cup of the sauce on the bottom of a 9 x 12 inch pan and then lay the cannelloni's on top of it. When the water in the pot is boiling add the cannelloni… Prep 10 min Cook 1 hr 20 plus cooling Serves 2-4. But as mentioned before, the … Add fresh spinach, cook 4-5 minutes.