Preheat your oven to 425° F and line a rimmed baking sheet with parchment paper.
Toss the broccoli florets with the olive oil and spread evenly on the baking sheet. Season the florets with salt and pepper.
Roast for 15 minutes, then turn each floret over and roast for about 10 more minutes.
Zest the the whole lemon over the broccoli and then squeeze the juice from half of the lemon over the broccoli (more if you like.) Sprinkle with the grated cheese and serve!
Notes
If you don't have Pecorino cheese, substitute with another hard, salty variety.
Parmesan
Romano
Asiago
More Tips for Roasting Broccoli
Do not over-crowed the baking sheet.
Place the larger piece of broccoli toward the edge of the baking pan.