Preheat oven to 425°F (220°C).On a parchment-lined baking sheet, arrange sweet potatoes, beets, Brussels sprouts, and cauliflower. Drizzle with most of the olive oil, season with salt and pepper, and toss. Roast for 25 minutes.While roasting, prepare grains and pesto dressing. For the dressing, whisk milk and arrowroot starch together. In a blender, combine basil, pine nuts, lemon juice, nutritional yeast, salt, and pepper. Blend while slowly adding olive oil and milk mixture.After 25 minutes, add kale to the baking sheet with remaining olive oil. Sprinkle garlic over all veggies, and roast for 10 more minutes until tender and crispy.Cook protein of choice.To assemble, add grains to a bowl, top with roasted veggies and protein, then drizzle with creamy pesto. Enjoy!