PREPARATION
- Heat oven to 400 degrees. Trim bottom of brussels sprouts, and slice each in half top to bottom. Heat oil in cast-iron pan over medium-high heat until it shimmers; put sprouts cut side down in one layer in pan. Put in garlic, and sprinkle with salt and pepper.
- Cook, undisturbed, until sprouts begin to brown on bottom, and transfer to oven. Roast, shaking pan every 5 minutes, until sprouts are quite brown and tender, about 10 to 20 minutes.
- Taste, and add more salt and pepper if necessary. Stir in balsamic vinegar, and serve hot or warm.