The perfect side dish. The easiest recipe. Cut Brussels in halves and place them on a baking sheet with chopped onion, olive oil, sea salt and black pepper. Roast at 350 until sprouts are crispy. remove from oven and place in mixing bowl. In a separate bowl, mix the juice of one lemon, a dash of balsamic vinegar, and a table spoon of dijon mustard. Pour mixture over Brussels Sprouts and stir until all of them are coated with the dressing. That's it. Enjoy.