Preheat the oven to 350 degrees.
In the bowl of an electric mixer, combine sugars & margarine & beat until just combined.
Add eggs & vanilla - mix.
Add peanut butter - mix.
Slowly mix in oats & baking soda & mix well.
Fold in chocolate chips & most of the candies - reserving a handful to adding to the top once baked.
Spread out into an even layer on a 4 sided baking sheet (either non-stick or lined with parchment) - pressing flat with your fingers or a spatula.
Bake for 15-18 minutes or until golden. Press the remaining candy into the top immediately after removing from the oven before they cool.
Allow to cool in pan before cutting.