Maggi Djon-Djon is a mushroom-flavored bouillon cube used to create the distinctive flavor of the Haitian dish "Du Riz ak Djon-Djon" (Black Rice). It provides the essential flavor for this traditional Caribbean dish, making it easy to prepare. 
Key aspects of Maggi Djon-Djon:
Flavor: It's a mushroom-flavored bouillon, giving the characteristic taste to the black rice dish. 
Usage: Primarily used to season white rice and other dishes, particularly in Haitian cuisine. 
Form: Available as bouillon cubes or tablets. 
Origin: Made by Maggi, a brand known for seasonings. 
Popularity: A popular ingredient in Haitian cuisine, especially for making "Riz Djon-Djon".