I make big bowls of salad and everyone takes a portion for lunch. Some good veggie ones are;
Chopped peppers, tomatoes, avacado sping onion, corriander, tin of black beans, sweetworn (I cook it on the cob and then char slighly on the gas ring but use a tin if you want to speed things up). Dressing of olive oil, lime juice, cumin, chipotle paste and salt (and a bit of liquid smoke if you have any).
Slice a red onion, soften slightly in olive oil, add garlic, cook for a minute of two and add spinach until wilted, season, whilst that's doing chuck some cherry toms in the oven with a little olive oil and salt until they're soft and a bit shrivelled. Mix everything with a tin of chickpeas, make a dressing of harissa, lemon juice, olive oil and salt. (I add fried chorizo too if any non-veggies fancy it).
Packet of brown rice, steamed broccoli, edamame beans, tofu or chicken, dressing of miso paste, rice wine vinegar, sesame oil and grated ginger.
Rice noodles, grated carrot, grated cucumber, chopped spring onions, little gem, coriander and mint, crushed peanuts, dressing of sweet chilli sauce, sesame oil, rice vinegar and palm sugar (also add prawns for any non-veggies).
Bulghar wheat, chopped toms, cucumber, spring onion, mint, parsley and dill (add pomegranate seeds if you like them), dressing of olive oil, lemon juice, cinnamon, allspice, garlic and salt. Put a big dollop of hummus on the top when you come to eat it.
They all take about 15-20 mins to make a large batch that will last for a few lunches.
I've got loads more if you want!