Place a rack in the upper third of your oven and preheat the oven to 400°F. Place the Brussels sprouts in the center of a large rimmed baking sheet. Drizzle with the olive oil and sprinkle with salt, pepper, and any other desired spice additions. Gently mix until the Brussels sprouts are evenly coated, then spread them into a single layer on the baking sheet. For even better crisping, flip the Brussels sprouts so that they are all cut sides down.
Bake for 20 to 30 minutes, until the Brussels sprouts are lightly charred and crisp on the outside and tender in the center. The outer leaves will very dark too. Watch carefully towards the end of the baking time, as the cooking time will vary based on the size of your sprouts. Season with additional salt and/or pepper to taste. Enjoy immediately.
*See recipe variations in blog post above.
TO STORE: Place cooked Brussels sprouts in an airtight storage container in the refrigerator for up to 4 days.
TO REHEAT: Add leftover cooked Brussels sprouts to a lightly oiled baking sheet. Rewarm in the oven at 350°F for 5 or so minutes, until heated through. You can also reheat them on a plate in the microwave for 30 seconds to 1 minute.
TO FREEZE: Because they can become soggy, I don’t recommend freezing roasted Brussels sprouts. However, if you end up with lots leftover, you certainly can freeze them. Place cooked Brussels sprouts in an airtight freezer-safe container and store in the freezer for up to 12 months. Let roasted frozen Brussels sprouts thaw overnight in the refrigerator, then reheat as directed above.