Marshall's long-time favorite lunch foods are either:
Tofu (silken, extra firm) simmered in about a 1/2 inch of low sodium chicken broth to make it warm...and then sprinkled with some parmesean cheese.
or...
Wagon wheel pasta - green (spinach) or red (tomato) or both...with Annabelle Karmel's simple cheese sauce (dab of butter, handful grated cheese of your choice, splash milk, melt, adjust cheese/milk ratio until correct thickness...) and frozen peas.
Hope this is at least some variety!
p.s. you can freeze the sauce in ice cube trays.