Cajun holy trinity The "holy trinity" in Cajun cuisine and Louisiana Creole cuisine is the base for several dishes in the regional cuisines of Louisiana and consists of onions, bell peppers and celery. The preparation of Cajun/Creole dishes such as crawfish étouffée, gumbo, and jambalaya all start from this base. Variants use garlic, parsley, or shallots in addition to the three trinity ingredient