How to cook
The asparagus may be cleaned. Put it in salted water over low heat until tender.
Drain from the water and arrange in a small pan. Cut the butter into several small pieces and arrange them on the asparagus.
Grate the Parmesan / if you have not grated it/ and put the pan in the oven. Bake at 390°F (200 °C) to melt the cheese.