I’m often eating meals out in the field, so we make stuff the day before, then package it up that night and just grab it on our way out the door that next morning. I tend to like big lunches, stuff like pasta, casseroles, burritos, etc, which doesn’t tend to travel well. But a little bit of experimentation and a little bit of practice, and you can get pretty good at figuring out how big a portion to take, how to package it up so it stays warm, and how to eat it outside without wearing most of it. Burritos are the toughest; I have a pack the toppings in a separate ziploc bag or two, and apply right there. They are also impossible to warm up; I haven’t figured out yet how to plug a microwave into my cigarette lighter (I’m not really joking about that; if anyone knows how, let me know!) Those meals might be bigger and/or heavier than what you’re wanting, granted. But if there are ways to pack those bigger meals, there’s ways to pack the smaller ones too.
One thing you might want to do, at least to get some ideas, is to get some backpacking cookbooks and see what all those options are. Not all of them will sound good and you won’t necessarily be carrying a stove with you (although I might start doing that, and depending on your activities, a family member could easily carry a backpack with a little portable camp stove). But those meals tend to be very efficient, very light-weight, carefully considered to be easy to make while outside, and best of all, have good calorie density for when you’re on the go from sunup to sundown. My husband has several from when he was a hunter in AK. I’ll see what books he recommends and let you know.
Another thing to do is just consider what foods you like to eat, as if you were home, then figure out how to make them in advance and take them with you when you go. There’s ways and means; you just need to get creative. But kudo’s on making the attempt.