The OPOS community started this project on the first day of the 21 day Indian lockdown. The goal was to empower anyone to cook anything, with whatever they have in the pantry. The emphasis is on techniques and not on recipes. You can use the same techniques to cook anything you like. Part 1 has a series of 21 simple graded lessons, with equipment most people have at home. Many lessons don't even need a pressure cooker. Part 2 covers 15 advanced lessons. Almost all of them call for pressure cooking without water, for very less time over high heat. These advanced OPOS techniques demand standardised equipment designed for OPOS, available at www.oposkit.com. It is dangerous to attempt them with normal pressure cookers. All these lessons are backed by live videos. As OPOS sounds too good to be true, periodic online classes are also conducted to help you take the first step in your OPOS journey. Welcome to OPOS. We hope the magic we experience daily in our kitchens touches your kitchen too!