Tuna tartare is an elegant starter originating from Los Angeles. The dish is made with a combination of raw tuna, avocado, egg yolks, green peppercorns, capers, chives, tarragon, mustard, olive oil, lemon juice, salt, and pepper. It was invented in 1984 by chef Shigefumi Tachibe at the Chaya Brasserie when a few customers came in wanting beef tartare, but one of them didn't eat beef, so the chef tried tuna, and it was an instant success.