Welcome to DC!
Bulk cooking on your day off: stews, chilis, soups, pseudo Egg McMuffins, quiches, lasagna, even leftover pizza, all frozen and portioned in individual servings work well. The Foodsaver works well for this, or you can use ziplock freezer bags. Nuke them at work in a nukeable container. A bag of salad with a bunch of stuff in it like thawed peas, chopped apples, raisins, bacon bits, leftover meat, cottage cheese, maybe a chopped hard boiled egg, shake it up with some salad dressing and something crunchy, like sunflower seeds.
She who dies with the most toys, wins.