Where are the nuts? High in protein, high in heart-healthy fat, concentrated calories, lots of variety, can be bought in bulk ready to eat. My "lunches" (really snacks that I munch on all day) are mostly nuts and dried fruit.
I prefer to make my meals up beforehand in individual servings that I can rehydrate. My dinners are all home-dehydrated (I'm doing this right now for the coming spring, summer and fall). This gives me lots of variety so I don't get tired of one thing (I can go 10 days without repeating a dinner). It also means that the only cooking I need to do on the trail is to bring water to a boil in the pot, saving both fuel and dishwashing. I hate washing dishes! Sarah of Trailcooking.com. is my heroine!
I do calculate pounds per day, although for the most part 1 pound per day is all I can manage to eat. Maybe it's those nuts I munch all day? Or maybe that at my age, 5-7 miles per day is my usual backpacking speed?
While I'm not a vegetarian, close to a half of my meals are veggie. Beans, lentils and TVP are just too useful and (properly prepared) tasty to ignore as protein sources! IMHO, dehydrated defatted hamburger and chicken also taste pretty cardboardy without additional seasoning.