Prep: Preheat oven to 400°F (204°C). Trim the tough stem from sprouts and remove outer leaves. Cut sprouts in half.
Assemble: Add prepared sprouts, 1 cup seedless red grapes, 2 Tbsp olive oil, 2 cloves garlic (minced), and ¼ tsp salt to a parchment-lined baking sheet. Toss everything together with your hands to evenly mix.
Cook: Roast sprouts 20 to 25 minutes, or until sprouts are tender and edges are golden.
Serve: Toss cooked sprouts and grapes with 2 Tbsp balsamic glaze and ¼ cup crumbled feta cheese. Serve warm!