Country onions are not a substitute for ordinary bulb onions. Also known as rondelles, the ground spice contributes a distinctive garlicky, earthy and subtly truffle-like character.
Brown the beef in small batches. Crowding the pot releases excess moisture and prevents the richly caramelized crust that gives the finished sauce its depth.
Serve warm with boiled plantains, yams, cassava, rice, cocoyams, bobolo or miondo.