In a large bowl, toss the Brussels sprouts with olive oil, salt, and pepper until evenly coated.
Spread the Brussels sprouts in a single layer on a baking sheet.
Roast for 20-25 minutes, or until tender and caramelized, stirring halfway through.
While the Brussels sprouts are roasting, make the glaze. In a small saucepan, combine the maple syrup, orange juice, Dijon mustard, and red pepper flakes (if using).
Bring the mixture to a simmer over medium heat, stirring occasionally.
Reduce heat to low and simmer for 5 minutes, or until the glaze has thickened slightly.
Once the Brussels sprouts are done roasting, remove them from the oven and transfer them to a serving bowl.
Pour the glaze over the Brussels sprouts and toss to coat.
Serve immediately.
Notes
For extra crispy Brussels sprouts, roast them for a few minutes longer.
You can also add other vegetables to the baking sheet, such as carrots, parsnips, or sweet potatoes.
If you don't have Dijon mustard, you can use another type of mustard, such as yellow mustard or whole grain mustard.
If you don't like spicy food, you can omit the red pepper flakes.
Keyword Brussels sprouts, caramelized, Gluten-Free, maple syrup, orange glaze, Side Dish, vegetarian