Step 1

Preheat oven to 375°.

Step 2

Combine sunchokes, 1 tablespoon olive oil, 1/4 teaspoon salt, and pepper in a large bowl; toss well to coat. Heat a large cast-iron skillet over medium-high heat. Add remaining 1 tablespoon oil to pan; swirl to coat. Arrange sunchokes, cut side down, in pan; cook 5 minutes or until beginning to brown. Arrange garlic and rosemary evenly over sunchokes. Place pan in oven; roast at 375° for 42 minutes or until sunchokes are tender and deep golden. Sprinkle with remaining 1/4 teaspoon salt.