" Now he's sautéing onions, garlic, bell peppers and paprika in a generous amount of oil?"
"Aha! I know! He's making soffritto, a base paste commonly used in Italian cuisine!"
Soffritto is finely diced herbs and vegetables sautéed in butter or olive oil until they become a paste. It's closely related to the French Mirepoix of onions, carrots and celery. But by adding paprika and bell peppers to the Italian version... yes, that will meld well with the anchoiade sauce, giving it depth and sweetness! "

― , 食戟のソーマ 24 [Shokugeki no Souma 24] (Food Wars: Shokugeki no Soma, #24)