Line a large baking sheet with parchment paper and arrange butternut squash and Brussel sprouts. Drizzle olive oil over veggies and let them roast for 35-40 minutes until evenly roasted. Stir veggies at 15-20-minute mark.
Meanwhile, whisk together olive oil, apple cider vinegar, garlic, salt and pepper together. Set it aside.
Towards the last 5 minutes, add bread pieces to the baking sheet so it gets toasted too.
Remove from the oven add arugula to the pan. Drizzle dressing over it and massage gently.
Top it with vegan cheese and pumpkin seeds at the end.