Place a pot over high heat. Drizzle in vegetable oil. Add diced onion, ground beef, and salt. Break up meat with wooden spoon into small pieces as it browns. After meat browns and releases its juices, continue stirring until the released liquid evaporates, about 4 minutes. Reduce heat to medium-high. Add garlic, chile powder, cumin, paprika, black pepper, and cinnamon. Cook and stir until mixture begins to darken, 3 or 4 minutes.
