We are minimalists...looking to broaden our menu. If we can add hot water to it and eat it we like to bring it! We bring our water to a boil then shut off the Jetboil to conserve fuel. The simmering thing doesn't work for us due to calculated and carried fuel supply. We will do precooked microwave bacon, also pancakes one time, and we certainly eat fish.
Currently we bring: 1. Ramen Noodles 2. Oatmeal 3. Ova Easy Eggs...which turn out great! 4. Idahoan Taters 5. Goose Sticks (Jerkyish)
Basically you're talking about "freezer bag cooking". Google freezer bag cooking and you'll get a link to Trailcooking.com, the original, as well as several others. There's also a thread pinned to the top of this forum. Using the search function here should also turn up several informational threads. I just buy many prepackaged dehydrated foods from suppliers like Hawk Vittles, Outdoor Herbivore, and Pack-It-Gourmet among others. Camp Chow is another line. Some people make and dehydrate their own meals at home; others just combine store ingredients to rehydrate in camp.
Cozy up meals instead of simmering... Make a set for your pots (Cliff Jacobson suggestion) or do it the lazy way and use those things to cover your toaster etc that you can find at Goodwill.... or just a plain 'ole towel. definitely saves fuel.