What kind of veggies? If mediterranean type (peppers, tomatos, onions, mushrooms, aubergine, courgette) then I'd roast them with some oil and you can then have in loads of ways, in a sandwich, dressed as a salad, with pesto, stirred through pasta with a little soft cheese or blended with tomato as a sauce, on the side with some chicken or fish...
I quite like a veggie paella which is nice with green veg, asparagus, peas, green beans etc and a big batch will keep for a few days (just be careful how you store and reheat it as the rice can be a food poisoning risk).
Or if it's root veg like carrots, swede, parsnip, squash then maybe a nice root veg curry or root veg and lentil stew? Bit heavy maybe but if I was having something like that for lunch I wouldn't do any extra carb with it to make it a bit lighter/lower calorie whereas for dinner I'd have rice or potato...