Asparagus with Parmesan and Balsamic Vinegar

English asparagus is the finest in the world and the first sweet, green spears of May are a seasonal joy, to be cooked simply and eaten with the minimum of saucing. All they need is a little melted butter or olive oil to shine. There is nothing better than local produce when it is in season and at its most delicious.

Select medium-sized, even bunches of asparagus with closed tips and a go