While your bacon is cooking, lets prep our veggies. Trim back the outer brussel sprout leaves and then cut in half. Half a butternut squash, peel the outside skin, and scoop the seeds from the center with a spoon. Cut the squash into cubes (***TIP: you can always buy butternut squash peeled and seeded at the grocery store to save time). Wipe the mushroom caps off with a damp paper towel and then half. Peel and dice you garlic. Finally, cut your onion into wedges to give you about 1 inch pieces of onion.