What should I buy to eat everyday?

I live in Gurgaon, I feel outside food is not hygienic, not healthy and too costly, each lunch costs upward of 120 Rs. I live away from my family for work, what should I buy daily to eat, can you guys pls suggest. The food that you guys suggest should be healthy and cheap. Recently I started eating atta maggi, but it is also too costly 30 Rs per packet, 1 packet doesn't fill stomach.