It's essentially the same dish as mafé under a different name — the Mandinka word for it simply means 'sauce.'
Meat or fish simmers slowly in a thick, ground-peanut sauce with tomato, onion and whatever vegetables are on hand, then gets ladled over rice. It's a staple of the Casamance-Gambia borderlands, where Mandinka communities on both sides of the river share the recipe.