What are best options to eat outside?

I stay spent in office for more than 8 hours. As there is no cooking facilities available at my place, i live on outside food. Every day my diet chart has green tea, two biscuits(breakfast), idli/dosa(lunch), two tender coconut water(evening), sprouts and grams(munching at night), dinner comprises 3rotis with chicken/noodles/biryani. What are my food options available for me I can have from outside? I desperately need to loose weight from tummy and thighs. Due my irregular work timings, i cant join gym. Please suggest