Bumblebee Snack Packs (I like the tuna salad)
https://www.bumblebee.com/products/
DelMonte Veggieful bowls (I like the quinoa with roasted red pepper)
https://www.delmonte.com/products/snacks/veggieful
Instant Soup/Ramen
Jerky (I like Krave’s Black Cheery Barbecue Pork)
Hawaiian rolls
fruit cups
individual cans of V8
Ritz bits (cheese or peanut butter)
sesame seeds
nuts
dried fruit
Carnation Instant breakfast (bottled)
I think you can also get ready to eat meals at camping stores like REI, but I haven’t actually tried them so I don’t know how helpful they would be for you.