Clean the Brussels sprouts and remove the outer leaves, then quarter the florets. Peel the onion and cut into slices approx. 3 mm thick.
Cover the bottom of the pan well with oil, heat it and sprinkle with 2-3 tablespoons of sugar. Heat without stirring until the sugar begins to melt. Then add Brussels sprouts and onions and stir-fry over low heat. When the Brussels sprouts and onions turn brown, deglaze with the red wine. Season with salt and pepper, add 2-3 dashes of balsalmico and the water. Cover and simmer for approx. 10 - 12 minutes, until the Brussels sprouts are firm to the bite. Tie with sauce thickener as desired.
Makes a wonderful accompaniment to a goose or as a vegetarian main course.