Preheat oven to 350 degrees F. Grease 9X13 pan with coconut oil or butter.
Drain grains well. Rinse them again from the acidic medium under running water. Leave them in a mesh sieve over a bowl while preparing remaining ingredients.
Mix eggs on medium-high speed until foamy (approximately 4-5 minutes). Add bananas and mix for another minute to combine well.
Add the grains and rest of the ingredients, except for raisins. Combine well but don't overbeat. Fold in raisins by hand.
Bake at 350 degrees F for 35-40 minutes. Allow to cool, then cut into bars.