1. Using a heavy based saucepan, heat the oil and soften the onion and carrots for about 10 minutes until softened but not coloured.
2. Add the chunked gammon/ham to the pan followed by the lentils and stock. Bring to a boil, reduce the heat and simmer, uncovered for about 30 minutes until the lentils are tender.
Add a little extra water if the broth appears too thick and serve piping hot.
A fabulous way of using up leftovers from a gammon/ham joint and equally delicious replacing the lentils with split peas but, do check the cooking times on the packet and adjust accordingly.