Mix peanut butter, sugar and egg until blended. Press or roll dough into 10x7-inch rectangle on an ungreased baking sheet. Bake at 325 degrees for 20 minutes. Remove from oven. Immediately arrange chocolate on top and cover lightly with aluminum foil. Let stand 3 minutes and remove foil. Spread chocolate over the entire surface and immediately cut into 2x1-inch bars. Cool
Yield: About 30 bars