The Mid Valley Megamall in Kuala Lumpur has more than 100 restaurants, cafes, and snack stands to meet every kind of craving. As of this month, that list includes a novel and seemingly quixotic option: Santan, a cafe that serves airplane food in cardboard boxes.

As restaurant concepts go, "quick airplane food" isn't an obvious winner. But Santan is owned and operated by AirAsia Group Bhd, the region's most successful budget airline. With profits declining in the industry, the company is looking to diversify — it wants to reduce flying from 80 percent of its business to about 40 percent by 2025 — and earthbound airplane food is central to its vision. Over the next few years, it plans to open more than 100 new Santans."

A year ago, when I first conjured the idea of turning ... our in-flight food choices into a fast-food restaurant, everyone thought I was crazy," says Tony Fernandes, the company's chief executive officer. "Just as they thought 18 years ago when I said I was starting an airline. Look how that turned out!"