Rinse and dry the Brussels sprouts. Cut them in half. Toss them with the olive oil, salt and pepper. Spread onto an ungreased baking sheet.
Dice the bacon and spread over the Brussels sprouts. Roast for 20 minutes. Sprinkle the chopped pecans over the Brussels sprouts and return to the oven for another 5-10 minutes.
Remove to a bowl and toss with maple syrup. Serve warm.