Preheat your oven to 425°F / 220°C.
Line a large baking sheet with parchment paper for easy cleanup.
In a large bowl, combine the quartered Brussels sprouts and whole garlic cloves.
Drizzle with olive oil, balsamic vinegar, salt, and pepper.
Toss thoroughly until everything is evenly coated.
Spread the Brussels sprouts and garlic in a single, even layer on the prepared baking sheet.
Roast for 10–12 minutes, tossing once halfway through, until they begin to soften and brown.
Carefully remove the baking sheet from the oven.
Add the chopped apples to the pan and toss gently to combine with the sprouts.
Return the pan to the oven and roast for an additional 10 minutes, or until the Brussels sprouts are tender and caramelized and the apples are soft.
Serve warm.
Don't overcrowd the pan. Use a large baking sheet to ensure the sprouts roast and get crispy, rather than steam.
Add a savory finish with a sprinkle of vegan Parmesan cheese or vegetarian bacon bits after roasting.