Ramen? easy - my fave:
dried portabello mushrooms, onions and sundried tomatoes from the grocery store (I don't own a dehydrator). enough boiling water to do the ramen and rehydrate the critter, a dribble of olive oil and some seasoning. I don't usually use the ramen packet. I usually use spaghetti sauce seasoning, or curry (both do well with that)

Lunch, vegitarian?

1) Block of parmigiano reggio. (it's bloody expensive, but my vegitarian hiking friends started carrying it, and exposed me to it on the trail. now I have to buy it.. darn veggie freaks moving me away from my landjaeger and pepperoni sticks.. it's supposed to work the other way, they don't eat tasty animals so there are more tasty animals for me to eat..)
2) bagels, pitas
3) instant dehydrated hummous (I find "Casbah" and "Fantastic Foods" brand at my local grocery store
4) dried mangoes, pineapple, bananna chips, etc.
5) clif bars, candy bars, etc. etc.
6) almonds. (I like smoked) (protien fat and oodles of fibre.)

Then again I just described my usual regaila of hiking lunch type stuff.