Heat a 12″ skillet over high heat; add oil, and swirl to coat bottom of skillet. Add garlic, and cook, stirring, until just golden, about 30 seconds. Add sprouts, soy sauce, and pepper, and cook, stirring, until sprouts just begin to wilt, about 1 minute. Add chives, and cook, stirring, until just wilted, about 15 seconds. Serve immediately.