Today, astronauts aboard the International Space Station will eat lettuce they grew themselves in space for the first time ever, Ars Technica reports. The experiment is part of NASA’s Veg-01 project that is investigating how plants respond to a zero-gravity environment. The ability of astronauts to grow sustainable food will become more important as the agency moves toward longer duration space missions farther out in the solar system, they say. The red romaine lettuce, known as “outredgeous,” was sent back to Earth after a previous planting to make sure the leafy green was fit for human consumption. Bon appétit!