Matt Kern, chef and owner of One Coastal in Fenwick Island, is a semifinalist for a James Beard Award in the Best Chef Mid-Atlantic category. This is Kern’s third semifinalist nomination. He was a semifinalist in 2019 and 2020 while working at Heirloom in Lewes. “It’s way different,” this time, said Kern, who purchased One Coastal from Scott and Carlie Carey in 2022. “I have …