Preheat the oven to 450°F / 230° Line a baking dish with parchment paper.
Chop the broccoli into medium size florets leaving a good amount of the stem for a nice shape. Mix the broccoli florets with 2 tablespoons of olive oil and the salt. Roast until they become tender and slightly browned – about 20 to 25 min (no need to stir them).
When the broccoli are done remove the pan from the oven. Grate the garlic onto the pan and add the remaining 1 tablespoon of olive oil and the lemon juice, gently toss it all together and serve immediately.