Preheat the oven to 200 °C. Line a baking sheet with aluminium foil and grease with nonstick spray. Soak 4 kebab skewers in hot water for 5 minutes.
1. Cut the boerewors into 4 equal lengths, roll each into a spiral and secure with a kebab skewer.
2. Arrange on the prepared baking sheet with the onions and garlic bulb. Drizzle the oil over and bake for 15 minutes. Alternatively, braai over the coals.