Season: Preheat oven to 425°F. Toss sprouts with olive oil, melted butter, salt, black pepper, smoked paprika, red pepper flakes.
5 Roast: Arrange sprouts cut-side down on a lightly oiled baking sheet, leaving space between pieces. Roast 12–15 minutes until the cut sides begin browning.
6 Add garlic and cheese: Sprinkle minced garlic and 1/2 cup Parmesan evenly over the sprouts. Return to oven for 5–7 minutes until the Parmesan is golden and the edges are crisp.
7 Finish: Transfer sprouts to a serving dish. Toss gently with lemon zest, lemon juice, remaining 1/4 cup Parmesan, parsley.
8 Serve: Serve immediately while hot and crispy.