When packing a lunch for later you always have to guard against things getting soggy. I love roma tomatoes for anything that has to be prepared ahead of time because they have far less water than a typical slicer tomato. Using romas helps ensure you don't end up with a soggy mess at lunchtime.
If you are trying to eat healthy more often then packing your lunch is a great thing to do. Try pairing a wrap like this one with a pink lady apple and a handful of almonds for your next lunch on the go.
Also, click HERE to check out a few other great lunch box recipes.