Pasta is the ticket, but, with my one cup pan, I was real limited. The directions called for 3 quarts of boiling water, but it isn't necessary. One day I bought ravioli and marinara sauce. I managed to spill quite a bit on the table, but ate it out of the ravioli container and a fresh salad out of a Gatorade container. It was great.
Lunch is tougher than dinner.
In remote areas, I buy Gatorade powder and put it in OneZip bags instead of the original cardboard can. Then, every morning, I make up one Gatorade water bottle and 2 regular water bottles. I refill all 3 at least once or twice per day when I have access to water. The Gatorade is usually hot, but hot Gatorade is more palatable than hot water. The good news is, I lose weight when I ride.