Working in 2-3 batches (depending on the size of your food processor), add the cauliflower florets to the bowl of a food processor and pulse 10-15 times until the texture resembles cooked quinoa. Add to a large mixing bowl. Repeat with broccoli florets, adding each batch to the bowl.
Add the quinoa, cranberries, chickpeas, parsley, and hemp hearts to the bowl. Toss to combine. Whisk together the dressing ingredients in a small bowl. Pour over the salad and toss to coat. Refrigerate for 20-30 minutes before serving.