First, slice both the mushrooms and the spring onions. Fry them in a frying pan heated with oil. Cook the manti according to the instructions on the packaging.
Take care of the sauce while the manti are cooking. Put the cream, an egg yolk, some finely grated Parmesan cheese, pepper and salt in a bowl. Mix everything and puree with a hand blender to give the sauce a frothy consistency.
Then mix the finished manti with the fried vegetables and add basil, planed parmesan and the foam.