1. Heat oven to 450F. Lightly grease a 15 x 10 pan.

2. Combine oats, sugar, margarine, corn syrup, vanilla and salt. Mix well. Firmly press mixture into the pan. Bake 12 minutes, or until mixture is brown and bubbly. Cool completely.

3. In a saucepan or microwave, melt the chocolate chips and shortening. Stir constantly if melting on the stove. Spread evenly over the oat base, and sprinkle with nuts. Chill until set, and cut into bars.