The peanut powder comes from a crop that defines the region: the Sine-Saloum basin has been the heart of Senegal's groundnut belt since the colonial era.
Rice is cooked down with dried fish, meat, vegetables and chili, then finished at the very end with a generous stir of roasted ground-peanut powder, thickening the dish into something between a pilaf and a stew. It's named directly for the Saloum region, where it's a home-kitchen staple.