In a big skillet, heat oil and add the meat. Stir occasionally and break up meat lumps with the back of a spoon. Cook until all moisture evaporates and meat starts to brown, about 10 minutes.
Add onion and stir until soft, about 5 minutes.
Mix in tomato paste, if used, salt, pepper, allspice, cinnamon, and chili, if used, and stir for a few minutes. Rem