Preheat the oven to broil.
Arrange the steaks and broccoli florets onto a baking sheet. Coat in oil and season with salt and pepper. Arrange the lemon slices over top. Broil for about 12 minutes for medium-rare, flipping the steaks and broccoli halfway.
Remove from the oven and sprinkle parmesan over the broccoli. Broil until the cheese is melted and the broccoli is golden brown, about 1 to 2 minutes. Slice the steak and divide onto plates with the parmesan broccoli. Enjoy!