1 cup chopped cauliflower
2 apples - peeled, cored, and cut into chunks
1 sweet onion, sliced
1 tablespoon olive oil, or more if needed
salt and ground black pepper to taste
1/2 cup golden raisins
1/4 cup chopped walnuts
1 tablespoon Chardonnay wine, or more to taste
Preheat oven to 400 degrees F (200 degrees C). Line a baking sheet with aluminum foil. Spread Brussels sprouts, cauliflower, apples, and onion onto the prepared baking sheet; drizzle with olive oil. Season with salt and black pepper; stir until evenly coated. Bake in the preheated oven until Brussels sprouts and cauliflower are tender, 20 to 25 minutes. Transfer Brussels sprouts mixture to a serving bowl. Fold in raisins and walnuts; drizzle with wine. Toss to coat.