Step 1

Heat the oil in a large saucepan over medium-low heat. Add onion and cook, stirring often, for 5 minutes or until soft. Add garlic and cook for a further minute or until aromatic. Add the carrot, potato, celeriac and cumin and stir to coat. Add the lentils, stock and water. Reduce heat to low. Simmer, partially covered, for 30 minutes or until vegetables are tender.

Step 2

Meanwhile, heat a chargrill on high heat. Spray with oil. Cook hot dog bun slices for 1 minute each side or until golden and crisp.

Step 3

Top soup with coriander and serve with the toasted bread.