Preheat the oven to 350°F.

Remove the tough woody ends of the asparagus by breaking them off or with a knife.

Coat a rimmed baking sheet or baking dish with olive oil.

Toss asparagus, pancetta and shallots in the baking dish.

Sprinkle with lemon juice and season with salt and pepper.

Roast the asparagus, tossing once or twice, until tender - about 8 to 10 minutes depending on thickness.

Remove pan from the oven and preheat the broiler.

Spoon the shallots and pancetta on top of the asparagus. Place the cheese on top of the asparagus. Broil until the cheese melts, about a minute.

Transfer asparagus to a platter and sprinkle with lemon zest before serving.