Tear or cut broccoli florets into small florets, roughly the same size to ensure even doneness. Thinly slice the stems ( ⅛-inch thick disks).
Pour ¾-inch of water into a medium pot and place a steamer basket over the top. (Water should not cover the bottom of the basket). Place broccoli stems in the basket first, then florets and cover with a lid. Bring water to a boil. Lower heat to medium-low, and simmer covered, until fork-tender, about 5 minutes. Test with a fork- see notes.
While the broccoli is steaming, heat oil in a large skillet. Saute garlic over medium heat until fragrant, add chili flakes. When garlic is golden add lemon zest, give a stir and turn the heat off.
Using tongs, add the steamed broccoli to the skillet, season generously with salt and pepper and give a gentle stir.
Taste, adjust salt, pepper, chili flakes. Add a little more olive oil if you like, so broccoli is nicely coated.
Serve and enjoy!
