1
Sauté the eringi in unsalted butter with salt.
2
Remove the mushrooms from the heat and continue to prepare the sauce in the same pan.
3
Melt the unsalted butter, add the heavy cream, and bring it to a vigorous boil.
4
Remove from heat and add the cheese with black pepper. Carefully pour the sauce onto the plate and arrange the mushrooms with sprigs of greens.