Preheat oven to 450 degrees
Remove the broccoli florets from the head, chopping any super large ones in half.
Add the broccoli to a bowl with the olive oil, lemon juice, and minced garlic. Mix with your hands, trying to push the garlic bits into the fluffy part of the broccoli.
I find that the garlic has a hard time sticking to the broccoli and any little bits left on the pan will burn. So, after you dump the broccoli mixture out on your cookie sheet, scoop up all the extra garlic that didn't stick and lay it on top of the broccoli. Season to taste with salt and pepper.
Roast in the oven for 20 minutes. No need to flip or turn them because you want that nice char. They should look slightly burnt when they come out.