The best meal I've ever had in the backcountry was something most people would never attempt. An acquaintance of mine at the time (who has since gone on to work as a chef at some fancy hotels, and then to teach other aspiring chefs) came hiking with us with an insanely heavy pack. He's built like an ox though, so he kept up quite well. When we all got to camp and the rest of us were relaxing before dinner, he got right to work, he opened his pack and pulled out a full leg of lamb, he then pulled out a bag of charcoal to cook it properly! Along with this he made baked potatoes and for desert he made a black forest cake in a coffee can (from scratch).
I don't think I've ever eaten that well, on or off the trail!
Some other memorable backcountry meals
– When I hiked the west-coast trail there is a "restaurant" in the middle of it (it's a shack made of driftwood, with a sand floor, and somewhere you would never go anywhere near if it was in civilization!) I'm not sure if it's the best burger I've ever eaten, or just because of the location, but it was pretty good!
– And I have to mention this one… For my "first date" with my current girlfriend we did a 3 day backpacking trip. The first night she made me steak and mashed potatoes, but unlike previous backcountry steak (see the "worst backcountry meal ever" thread) this one was amazing, it had been marinating in a ziploc in her pack all day, it was amazing! (I made her my famous backcountry pancakes for breakfast) (we've been together for 4 years now… so she obviously knew the way to a guy's heart!)