Preheat oven to 425°F (220°C).
In a large bowl, toss the cauliflower florets and sweet potato cubes with avocado oil, garlic powder, paprika, salt, and pepper.
Spread onto a baking sheet and roast for 25–30 minutes, or until golden and tender.
Remove from the oven and toss the cauliflower with buffalo sauce. Return the cauliflower to the oven for 5 additional minutes.
While the vegetables are roasting, whisk together all dressing ingredients in a small bowl.
Assemble the bowls by dividing the mixed greens among serving bowls. Top with buffalo cauliflower, roasted sweet potatoes, sliced Dandy® Celery, avocado, and grilled chicken.
Drizzle with the Greek yogurt dressing and serve immediately.