Smoked Portabella Mushrooms and Tomatoes

Cut out and discard mushroom stems and halve tomatoes lengthwise. Arrange mushrooms, gill sides down, and tomatoes, cut sides up, on rack of smoker. Line drip tray of smoker with foil and spread wood chips evenly over center of smoker pan. Put tray on top of chips and put rack in tray. Put smoker on stove, using 2 burners, and heat, uncovered, over moderate heat until chips begin to smolder. Smoke mushrooms and tomatoes, covered, over moderate heat 30 minutes. Remove smoker from heat. Let mushrooms and tomatoes stand, covered, 30 minutes.