Nutrition: per serving
Heat the oven to 160C/140C fan/gas 3. Put the fennel, lemon peel, 6 crushed garlic cloves, peppercorns, bay leaves and 2 tsp of salt in a medium, deep baking dish. Toss together, then pour over 375ml of oil. Everything should be submerged but add a little more oil if needed. Cover tightly with foil, then cook in the oven for 2 hrs 30 mins, turning everything over halfway through, until the fennel is tender.
Meanwhile, put the lentils in a pan and cover with 675ml of water. Bring to the boil, crumble in the stock cube, stir, then reduce the heat and simmer for 30 mins until tender but still with a little bite.
During the final 15 mins of the fennel cooking time, put the walnuts in a baking tray and cook in the oven until golden and toasted – check after 10 mins to make sure they are not burning. Remove from the oven and chop.
Strain the fennel, discarding the aromatics and reserving 60ml of the oil. Put the remaining minced garlic clove, lemon juice and mustard in a bowl. Slowly drizzle in the oil, whisking as you go, until emulsified. Whisk in most of the dill, season to taste, then toss with the lentils and walnuts.
Divide the lentils between serving plates, top with the fennel, goat’s cheese and an extra sprinkle of dill, with a crack of black pepper to finish.
