1.     Heat 1 tbsp olive oil in a medium-sized saucepan. Add the lentils, 1 tbsp dressing, ½ the watercress and 150ml of water, and cook for 7-8 mins or until the watercress has wilted and the lentils have broken down a little.

2.      Season.

3.     Grill the gammon steaks to your liking

4.     Serve with the lentils and remaining watercress tossed in the rest of the dressing.