Mix your rolled oats, peanut butter, nutella & oil in a bowl until your mixture is well mixed.  With a small cookie scoop, form balls or bites from your mixture. Place on tray or rack.

Pour your powered sugar in a bowl, and roll each bite into your powered sugar.  This step and ingredient are totally optional.

In a microwave safe bowl, melt your white chocolate melting chips in 30 second intervals.  Heat your chocolate melting chips until they are fully melted.  Dip your bites into the melting chocolate and place on a tray or rack.  Top with a few M&Ms while the melting chocolate is still warm and melted.

Serve as soon as they're firm, or store in an air tight container and enjoy.