One of the easiest and tastiest lunch ideas for your workplace is definitely rajma chawal.
Try and idli and sambhar, for its healthy and easy to make and will fll you up.
Want healthy and tasy, but don't want to engage too long with cooking? Well lemon rice is the best option for you.
Use your leftover rice and add some spice and vegetables to it to make yourself a veg pulao.
Another healthy option for you which can be made in the morning itself without any hassle.
You can make some roti and bring some leftover sabzi. Quite ideal for an office lunch.
Make your dough and aloo a night before and in the morning make a tasty aloo paratha just by stuffing the potato and cooking it.