In a food processor, blend the oats, ⅓ cup rice cereal, coconut, salt, cinnamon, dates, and water until a dough forms. Pulse the remaining 2 tbsp cereal to distribute throughout the dough.
Turn the dough out onto a large piece of wax paper and press into a disk. Place another sheet of wax paper on top and roll out using a rolling pin into a 10" by 6" rectangle about ⅛" thick.
Cut the rectangle into 10 pieces, each 5" by 3".
In a small bowl, combine the almond butter, maple syrup, and vanilla extract. Divide this filling mixture between 5 dough pieces, leaving a ½" boarder around the sides.
Seal the almond butter mixture with the remaining pieces of dough (like a Pop Tart!)
Drizzle the top with melted chocolate if desired.
Recipe by Radiant Rachels at https://radiantrachels.com/homemade-stuffed-clif-bars/