Heat oven to 400’F (205’C). In jellyroll pan toss sunchokes, tomatoes, garlic, rosemary, oil, and salt & pepper. Arrange sunchokes around edge of pan and tomatoes in centre. Roast vegetables for 20 minutes. Gently stir green onions into sunchokes and continue to roast until sunchokes are tender and browned, about 10 min longer.