https://www.youtube.com/watch?v=0_R_-ivj77QB Ramakrishnan better known as OPOS Ramki a 1989 batch alumnus and a Chennai-based chef and restaurateur teaches us the basic OPOS techniques. Pressure Baking and Cold Pressure Frying. Sounds like a lot? What if we told you with these techniques you can cook a biryani in 10 minutes? Watch this video to learn more.