How to Make It
Preheat oven to 425°. Remove discolored leaves from Brussels sprouts. Remove and discard stem ends, and cut sprouts into quarters. Toss with olive oil, kosher salt, and 1/2 tsp. freshly ground black pepper, and place in a single layer on a baking sheet. Bake 25 minutes or until golden and tender, stirring halfway through.
Meanwhile, stir together cream, rosemary, and garlic in a medium saucepan. Cook over medium heat, stirring occasionally, 15 to 20 minutes or until reduced to about 1 cup. Discard rosemary and garlic. Stir in grated Parmesan cheese. Drizzle over Brussels sprouts mixture. Top with shaved Parmesan cheese, sliced chives, and black pepper, and serve immediately.