Bring a large pot of salted water to boil. Add the sprouts and cook until bright green, 2 minutes. Drain well and pat dry
In a large, deep skillet, heat 3 tbsp of teh oil until shimmering. Add half of the garlic and half of the Brussels sprouts and cook over high heat undistrubed for 1 minute. Add half of the crushed red pepper, season with salt and cook over moderate heat, stirring a few times, until the Brussels sprouts are browned and tender, about 3 minutes. Transfer to a serving bowl. Repeat with remaining ingredients. Serve warm.