fresh basil leaf, to garnish
150驳/5陆辞锄 celeriac, peeled and cut to 2陆cm/1in cubes
1 clove garlic, finely chopped
陆 red onion, roughly chopped
100驳/3陆辞锄 puy lentils
pinch dried chilli flakes
salt and freshly ground black pepper
1 tbsp olive oil
1 tbsp tomato pur茅e
200ml/7fl oz hot chicken stock (vegetarians may substitute vegetable stock)