1. In a large bowl beat butter until fluffy; gradually beat in sugar until light and fluffy.

2. Beat in peanut butter, egg and vanilla until smooth.

3. Combine flour, baking soda and salt; gradually mix half into peanut butter mixture.

4. Using hands mix in remaining flour mixture to form a stiff dough; refrigerate for 45 minutes.

5. Meanwhile prepare the filling. Melt chocolate with butter in a bowl over hot (not boiling) water. Let cool.

6. Divide chilled dough in half. On a lightly floured surface roll each half into 10 X 8 inch rectangle.

7. Spread each recatangle with half the chocolate mixture.

8. Starting from long side roll up each rectangle jelly roll style to form 2 long rolls. Wrap separately seam side down in plastic wrap.

9. Chill until firm or up to 12 hours.

10. Using a sharp knife, cut into 1/4 inch slices. Place 1 1/2 inches apart on a lightly greased baking sheet.

11. Bake at 375 degrees for 10-12 minutes of until lightly browned. Transfer to wire rack to cool.

120 calories, 8g fat, 2g protein