Looks like I am bucking the trend here but I can't stand most of the freeze-dried meals, especially Mountain House brand. I have never understood why they need to add so much salt to the meals, basically like sucking on a salt rock to me.
I go on 7-9 days backpacking excursions every summer and have learned, as long as you own or have access to a dehydrator, you can make you own meals at home. One of our favorites is homemade chili, just cook it up normally, place on the fruit leather tray and let it go until it breaks up into small "chips". If you make it well ahead of time just throw it in the freezer until time to leave and it will keep unrefrigerated for longer than I could ever live out of my backpack.
Other items we enjoy are the dry mix packages of soup, chicken tortilla soup for example, and add a pouch of chicken. Grits with dehydrated bacon and cheese is another good one. I guess these may not qualify as "ultra-light" but they do make eating a joy as opposed to something to force down when you are exhausted.