Wash and thoroughly dry all leafy greens and vegetables.
Finely chop the kale leaves and place them in a large mixing bowl.
Shred the broccoli stalks, Brussels sprouts, and red cabbage using a mandoline or food processor with a shredding attachment.
Add the shredded vegetables to the bowl with the kale.
Massage the kale and vegetable mixture briefly to slightly soften the textures.
Add the dried cranberries and roasted pumpkin seeds to the bowl.
Drizzle the poppyseed dressing over the salad and toss thoroughly until evenly coated.
Serve immediately or let sit for 10 minutes to allow flavors to meld.