Bring a large pan of water to a rolling boil. Meanwhile, trim the tough bottom inch or so off the asparagus.
Or steam the asparagus for 90 seconds, then remove. Rinse with cold water until they're no longer hot.
Arrange the asparagus on a baking sheet, parallel to one another and almost touching. Pour a ribbon of olive oil back and forth across the asparagus, but not so much that it collects on the baking sheet. Sprinkle lightly with crushed red pepper to taste and lemon juice. Then top with enough Parmesan cheese to form a gappy layer.
Put the pan under the broiler, about four inches from the heat, until the Parmesan cheese melts and just begins to brown.
Remove from the oven and allow to cool enough for the cheese to set. Then, using a metal spatula, remove four to six asparagus, still held together by the cheese, and serve.