Okay, so we all know plane food doesn't exactly hit culinary heights, unless you're lucky enough to be travelling in first class.
But, it's not just the fault of the caterers, as the video below from SciShow explains. In fact, the unique conditions of a pressurised plane cabin contribute to a significant decrease in your ability to taste food: air pressure, humidity and background noise all contribute to making the eating experience a bumpy ride.
The problem of making food taste great at 38,000 feet is also something that fascinates chefs, including the likes of three Michelin star chef Andreas Caminada, who served up some delicious inflight treats a little more recently.
Dal is one of those recipes that goes all the way back to the Indus Valley Civilisation. Unlike dishes such as biryani, brought to India by the Moghuls, it is one of those foods that has always been there. It is therefore a building block of Indian culture.