Peel bananas and cut crosswise into halves. Insert a wooden stick into the end of each banana piece. Place in a shallow pan; set in freezer 2-3 hours. Melt chocolate in a small glass bowl in microwave oven (about 2 minutes at high); stir occasionally. With a spatula spread chocolate over frozen bananas, using lengthwise strokes. Chocolate will become firm as it is spread. Wrap in aluminum foil and store in freezer. Serve Frozen. If chocolate becomes too firm to spread, return chocolate to microwave oven and heat for a few seconds at High.