In large bowl, toss 1 pound Brussels sprouts with ¼ cup olive oil, 4 tablespoons balsamic vinegar, 1 teaspoon sea salt, and ½ teaspoon black pepper until well coated.
¼ cup olive oil, 4 tablespoons balsamic vinegar, 1 teaspoon sea salt, ½ teaspoon black pepper, 1 pound Brussels sprouts