Make dressing by adding all dressing ingredients together and mix to combine
Make walnuts by combining walnuts, olive oil, maple syrup, rosemary, salt, and paprika
Place walnut mixture on a baking sheet and bake at 400°F for 7 minutes
Assemble salad by adding shredded brussels sprouts, grapes, dates, shaved Parmesan, red onion, and salt and pepper to a bowl
Add the roasted walnuts and dressing to the salad and toss to combine
