Peanut Butter Bars

1 C Margarine
1 C Sugar
1 C Brown Sugar
2 Eggs
1 C Peanut Butter
1 tsp Soda
1/2 tsp Salt
2 tsp. Vanilla
2 C Flour
2 C Oatmal
Mix and press in 9X13.  Bake at 350 degrees for 12-15 minutes.  Spread with chocolate Frosting.