I couldn't find date paste so I made my own. If you can find it already prepared that would be one less step to follow.
Bars are best kept wrapped individually for on-the-go healthy snacking. Does not need refrigeration, but my kids like them cold and I keep them in one of the drawers of my fridge so they can grab them with a yogurt or applesauce when they're making their lunches.
I used a large metal spatula to cut versus a knife.