Preheat oven to 400 degrees.
Trim and halve clean Brussel sprouts. Toss with oil, salt and pepper.
Spread on a baking sheet, cut side down. Roast for 20-25 minutes.
Meanwhile, make the glaze . In a saucepan, combine the butter, garlic powder, maple syrup, sriracha, vinegar, and ground ginger. Simmer for 3-5 minutes, or until slightly thickened.
Toss the Brussel sprouts in the sauce, and sprinkle with pecans.