HOW TO ROAST BRUSSELS SPROUTS:
To make oven-roasted Brussels sprouts, simply:
Toss with oil. You can either do this in a large mixing bowl or directly on the sheet pan itself — up to you.
Arrange on the sheet pan. Spread the Brussels sprouts out in an even layer on your sheet pan.
Season with salt and pepper. Sprinkle the Brussels sprouts liberally with salt and pepper, to taste.
Give them a flip. Then go around and flip over each of the Brussels sprouts so that they are cut-side-down. If any of the leaves come loose, don’t worry — just nestle them in around the Brussels.
Roast. Then pop them in the oven and cook until the Brussels sprouts are browned a bit on the top and bottom, and any of those loose leaves are nice and crispy.
Season. Remove from the oven, and give them a final taste-test. If they still need more salt and pepper, sprinkle a bit more on. Then serve warm and enjoy!
Source: "Gimme Some Oven" https://www.gimmesomeoven.com/perfect-roasted-brussels-sprouts/