Tanisha Singh is getting ready for work early one morning and cooking a simple curry for her lunchbox when she realises she's out of tomatoes. Onions are already frying in the pan. Going out to buy vegetables is not an option, as local vegetable vendors won't be open. So Tanisha picks up her phone. On a quick-delivery app, tomatoes are available. Eight minutes later, the doorbell rings. The tomatoes have arrived. What might feel remarkable in some parts of the world has become commonplace in