Generally, I can get the food I need, even when weight is critical, from standard supermarket fare, especially if I don't need to pack a lot of water. Stuff like instant oatmeal, dehydrated potatoes, cheeses, beef jerky will generally do quite nicely. i will repackage if bulk is an issue. I also toss in some MH stuff, but it is quite expensive.

If I must carry water, or if travelling by vehicle, I go for favorite canned goods - Dinty Moore beef stew is a current fav. You can often supplement what you carry with gathered items - berries, miners lettuce, and the like. This adds fresh greens and variety. Once can be surprised at what is out there for the taking...