Have you tried making your own Cup Noodle or Pasta Mug Shot?
These are popular light lunches or snacks, that can be prepared at work. Unfortunately, the ones you buy from the shops often contain dairy products and/or animal stock
Of course, the noodles and pasta are exactly the same as those that you make in a saucepan at home
To make your own Pasta Mug Shot:
Half fill a mug with some dry wheat pasta (use small pieces, like macaroni). Add some things to flavour it, like some vegan tomato soup mix. Add boiling water to the mug (up to 15mm below the rim) and stir well. Leave it for 5 minutes. If the pasta is thicker, you may need to leave it longer. When the pasta is soft, it is ready to eat.
To make your own cup noodle:
Simply buy a tupperware container or portable soup bowl that is about the same size as a noodle cup. Also buy a cheap block of dried wheat noodles. Put the noodle block in the bowl and add some tofu, finely chopped vegetables, and maybe some seaweed or flavourings. Add boiling water and leave for a couple of minutes, until the noodles are soft.
You can probably make couscous in the same way, although I haven't tried it!