Gwyneth Paltrow is back making headlines. But this time, instead of a questionably scented candle or overpriced piece of home decor, it’s a surprising superfood that’s flooding social media. The actress and founder of lifestyle brand Goop recently appeared on Today to promote her “delivery first” restaurant concept Goop Kitchen. In a cooking segment with Savannah Guthrie and Carson Daly, Paltrow shared she likes using arugula as a replacement fo…