Just in case you are worried I am "emaciated," the word both Emily D and Becca used, fear not. I am exactly the same weight, exactly, as I was two months ago. My body's much stronger and my legs are much hairier, but really I look the same.
I do eat more, like a lot more. They say hikers use about 6,000 calories a day. That roughly translates to: Pre-breakfast, Breakfast, Second Breakfast, Lunch, Ice Cream/Cookies, Snack, Dinner, Dessert. Good thing I LOVE food.
On the trail, I'm usually eating:
black bean soup
split pea soup
and an assortment of Mountain House freeze-dried dinners
I also carry spices--cinnamon, salt, pepper, oregano, curry powder, turmeric--in little plastic button bags. Even with spices though, trail food gets boring. Thus, combinations of the above items (ramen noodle-oatmeal, hummus-tuna) provide interesting, if questionable variety.
Anyway, food is well and good, and my body is healthy and happy, and for that, I can't be grateful enough.