Heat oven to 350 deg F. In a shallow baking pan arrange yam halves; dot with butter. Mix remaining ingredients, except tangerine sections; pour over all. Bake for 25 min, uncovered; baste with syrup once or twice during baking.
Remove from oven; scatter tangerine sections over top of yams; return to oven for another 5 min. Can be served at room temp or chilled.
