Preheat oven to 350 degrees. Spray a 13×9 in. pan with cooking spray
In a large bowl mix oats, flour, sugar, salt, and 1 cup butter with a spoon. Stir in pecans. Remove 1 cup, set aside to use later as the topping.
Press remaining mixture into pan.
In a saucepan, cook condensed milk, chocolate chips, and 2 tbsp butter over medium heat, stirring constantly, until the chocolate chips are melted and the mixture has turned into a smooth and creamy goodness.
Spread chocolate mix over crust.
Sprinkle with candies and reserved oat mixture, pressing oat mix into chocolate mixture.
Bake 23-25 minutes or until set.
Cool completely - around 2+ hours. Cut into bars.