Recipe: Mix all the ingredients, except the tomato sauce and cooking cream, in a bowl and season to taste. Follow the package instructions to boil the manicotti shells. Cool down the manicotti shells by dipping them briefly in cold water. Fill the manicotti with the ricotta and spinach filling and arrange them in a baking dish. Mix the tomato sauce and cooking cream in a pan and pour the sauce over the manicotti. Cook in a preheated oven at 450 F for about 20 minutes. If the blush sauce thickens before the manicotti are ready, pour some water of cream in the baking dish. This recipe is for 4-5 portions of manicotti.