Chef Josh Gjersand prepares a sandwich for Mount Diablo High School students to try during a taste test in Concord, Calif., Friday, Jan. 13, 2023. AP Photo/Godofredo A. Vásquez
By Jocelyn Gecker Associated Press CONCORD, Calif. (AP) — As the fine-dining chef at a suburban high school gave samples of his newest recipes, junior…
