Palak paneer. Aloo gobi, cabbage, French beans and carrots, methi aloo, sweet potatoes, tindli, red pumpkin, white pumpkin, etc.
These can be eaten on their own, with some yoghurt, or a little brown rice.
Any of these can be cooked and carried for lunch at work.
Ofcourse you can do a simple stir fry or pan fried chicken in coconut oil.