If you both want the same thing, how about:
Soup- you can heat yours in microwave, your OH could take a flask of it
Mug Shots- you just need boiling water, so again a flask would help for your OH
Cold meals like a lunch box full of salad, HB eggs, cold meats, pasta etc
Fruit is handy!
SW fritatta is lovely hot or cold
Sandwiches using your HEXs or syn the bread
Yoghurt
Use your syns on a bag of crisps to go with a sandwich etc
You've to be organised though, so maybe get into habit of making your lunch the night before.