Add the butternut squash, cauliflower florets, onion and garlic onto a sheet pan. Drizzle the olive oil on top of the vegetables, along with salt and black pepper to taste. Place the sheet pan into the oven, and roast stirring occasionally for 1 hour.
6 Cups Seeded, Peeled and Cubed Butternut Squash, 4 Cups Cauliflower Florets, 1 Medium Onion, cut into 8 large pieces, 3 Cloves Garlic, 2 tablespoon Olive Oil, ½ teaspoon Kosher Salt