Monster Cookie Bars

1 stick margarine*
1 c. sugar
1 c. brown sugar
1 1/2 c. peanut butter
3 eggs
1 t. vanilla
2 t. baking soda
4 1/2 c. oatmeal
12 oz. chocolate chips
12 oz. plain M & M's

Mix ingredients in order given in large mixing bowl.  Press into a large greased jelly roll pan.  Bake 15 minutes at 350 degrees.  Do not over bake.

*I use butter - I know that margarine is cheaper but butter is actually healthier for us.  It's a staple in our home.