Instructions: Preparation Time: 0:20

1. Crust: In large bowl, beat margarine, sugar, egg yolk, and vanilla until smooth, using an electric mixer. Add flour and oats; stir until well combined.

2. Press mixture in bottom of a lightly greased 13 x 9 x 2-inch pan.

Bake in preheated 375-degree oven for 15 minutes or until golden brown.

Cool slightly.

3. Topping: Melt chocolate and margarine over hot, not boiling, water. Spread over warm cookie crust. Sprinkle evenly with coarsely chopped nuts.

4. While still warm, cut into bars using a sharp knife. Let cool completely before removing from pan.

Yield: about 2 dozen bars.

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