Place a large rimmed baking sheet on an oven rack in the lowest position and heat the oven to 500°. Trim the bottom of the sprouts, peel and discard any unhappy-looking leaves, and halve the sprouts.
In a large bowl, drizzle the sprouts with the oil and toss until they¿re evenly coated. Sprinkle with the salt and the sugar and toss gently to combine.
Remove the hot baking sheet from the oven. Carefully transfer the sprouts to the sheet and spread them evenly, flat sides down.
Place the sprouts in the oven and roast them until they¿re well browned and tender, 10 to 12 minutes. Serve immediately with lemon wedges.