Place a rack in the center of your oven and preheat the oven to 400 degrees F. For easy clean up, line a large rimmed baking sheet with aluminum foil, and place the Brussels sprouts in the center. (If you prefer not to use foil, cook the Brussels sprouts directly on the pan or use a silicone baking mat.)
Cut the bacon crosswise into ¼-inch pieces. Place them on top of the Brussels sprouts. Drizzle the pan with the olive oil and maple syrup and sprinkle with salt and pepper. Gently mix until the Brussels sprouts are evenly coated, then spread them into a single layer on the baking sheet, breaking apart the bacon and scattering it evenly throughout. For even better crisping, flip the Brussels sprouts so that they are all cut side down.
Bake for 20 to 30 minutes, until the Brussels sprouts are lightly charred and crisp on the outside and tender in the center and the bacon is crisp. The outer leaves of the Brussels sprouts will be very dark too (this is the caramelized maple syrup; they taste amazing). Watch carefully towards the end of the baking time, as the cooking time will vary based on the size of your sprouts. Taste and season with additional salt and pepper as desired. Enjoy hot.
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 degrees 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 them in the freezer for up to 3 months. Let roasted frozen Brussels sprouts thaw overnight in the refrigerator, then reheat as directed above.