*Granola bars- particularly high protein bars like clif bars. Powerbars pack a lot of energy too but i think they're kinda gross.
*fruit leather/dried fruit
*rice cakes and peanut butter/mini bagels and cream cheese (wont get squished or go bad if its not real hot outside)
*Jerky- lightweight, lots of protein. there is even vegetarian jerky made from seitan called primal strips that are really good.
*trail mix- nuts, dried fruit, chocolate all good for fast energy needed to get up steep climbs
*fast cooking pasta/ramen noodles or beans and rice (any store-brand like zatarains that u add water to)- easy warm food for dinner- put peanut butter in with cooked noodles for backcountry pad thai
or get a few feeze-dried meals for dinner- very easy to make- you just boil water and pour it in the pouch, let sit, then eat directly from the bag. Pare down all the packaging before you leave (don't forget cooking directions) and bring a spork!