Put the asparagus in a steamer basket and steam over high heat until bright green and crisp-tender, about 3 minutes. Transfer the asparagus to a plate.
Wipe out the pot. Add the olive oil and when it is hot, add the garlic and cook over moderate heat until fragrant, about 30 seconds. Add the asparagus, season with salt and pepper and cook for 1 minute. Transfer the asparagus to a plate, top with the pecorino and serve.