David Gussin of Queens says he invented the “everything” bagel sometime around 1980, when, in a stroke of inspiration, he married poppy seeds with sesame seeds, salt, onion and more. The longtime New Yorker remembers gliding into the Howard Beach bakery on hockey skates for his first day of work. He was fresh from a practice with the Canarsie Cougars. He makes no claim to excellence as a player. “I stunk,” he says. But as a baker, he was visionary.