In an increasingly food-obsessed world, journalists and consumers alike are digging into the politics of what ends up on our plates. This global food chain means farmers and families at home and abroad are interconnected in new and complicated ways. M.J. talks to Maddie Oatman, co-host of Mother Jones magazine’s new food podcast “Bite,” about what she’s uncovering in her day-to-day reporting, how living abroad shaped her perspective, and this year’s four trendy foods that could balance sustainability and appetite.