I agree with the Tuna Steaks, especially the lemon spicy thai. Simple, easy, quick and impressive!
Yes, we always prepare and then dry. If you don't have a dehydrator, just make it up, line a cookie sheet with cooking parchment (or thick plastic -like the type you would staple over insulation), spread the mixture thin (feel free to use 2 cookie sheets), and then put it in the oven at hmmmm 120 F. Put a knife in the door so that the oven stays open a bit so the humidity can escape.
Not as impressive, but filling and yummy, is mock shepard's pie. Buy a liptons intant potatoes and gravy, layer it over TVP soaked in beef boullion, and onion soup mix (or can dry ground beef cooked in the same), and top with shredded cheddar.
Lots of advice in the in the forums under dehydrating. We have a harvest food works- my camera is in it right now drying out
for lunch:
chicken salad sandwiches in pita or B (no L) T for lunch , instant re-fried beans or black bean and salsa ; babaganoosh and cucumber slices on tortillas or pita's; salmon (in foil pouches) sandwiches on rye;
breakfast -granola, porridge, Alpen with dried fruit, english muffins, jam; pancakes (can cook them at home, leave them out over night to dry out a bit, put them in a zip lock, freeze them until you are ready to go, and you can keep them for days. You just drop them in the fry pan to reheat them)