Whisk together dressing. Store in an airtight container like a mason jar.
Put together your salad: Brussel sprouts, berries, and then the walnuts.
Top with dressing and enjoy.
Notes
If the Brussel sprouts are a bit too tough for you (I like the texture and "work" they provide), you can also sear them in a sauté pan over a high heat until they just soften. Allow to cool before creating your salad. Be sure to store the leftover dressing in the fridge and shake or stir prior to using for future salads.