Mirepoix (cuisine)
Similar flavour bases include the Italian "soffritto", the Spanish "sofrito", "refogado/sufrito" (braised onions, garlic and tomato) from Portuguese-speaking nations, the German "suppengrün" (leeks, carrots and celeriac), the Polish "włoszczyzna" (leeks, carrots, celery root and parsley root), the US Cajun / Creole holy trinity (onions, celery and bell peppers), and possibly the French "duxelles" (mushrooms and often onion or shallot and herbs, reduced to a paste).
Creole sauce
Creole sauce, also referred to as "red gravy", creole tomato sauce, and sauce piquant in New Orleans, is a Creole cuisine, Haitian cuisine, and New Orleans cuisine sauce made by sauteeing vegetables in butter and olive oil. It is used in the American south. It is made with tomatoes, the Cajun holy trinity (celery, bell peppers, and onions), garlic, seasonings, and herbs. Stock (usually chicken) is also used and seasoned with cayenne, hot sauce, bay leaf, salt, black pepper, thyme, and parsley.