Preheat the oven to 375 degrees and line a baking sheet with parchment or foil for easy cleanup.
Prepare the Brussels sprouts by removing any yellow or brown outer leaves, cut off the stems, and slice in half. Toss the Brussels sprouts, bacon, garlic, olive oil, and maple syrup in a large bowl. Once everything is coated, spread them onto the prepared baking sheet—season with salt and pepper to taste.
Roast in the oven for 25-35 minutes, or until fork tender, stirring half way through. Baking time will vary depending on how large the sprouts are. Toss with toasted pecans before serving.