AT A GLANCE
This light soup makes a hero of tender leeks, while a generous amount of parsley brings a burst of grassy freshness. To take it gluten-free, add a swirl of crème fraîche in place of the croûtons.
|01||Melt butter in a large saucepan over medium-high heat, add leek, celery and garlic and stir occasionally until tender but not coloured (4-5 minutes). Stir in potato, thyme and bay leaf, season to taste, then add stock and cream. Bring to a simmer, half-cover with a lid and continue to simmer until well flavoured and potato is tender (5-10 minutes). Discard thyme and bay leaf. Add parsley and spinach and stir until wilted, then purée with a hand-held blender and adjust seasoning to taste.|
|02||Meanwhile, for buttery croûtons, melt butter in a frying pan over medium-high heat. Add bread and fry, stirring occasionally, until golden brown (4-5 minutes). Strain butter through a heatproof sieve into a metal bowl and stir in lemon juice. Toss croûtons with lemon rind in a separate bowl.|
|03||To serve, ladle soup into bowls, scatter with croûtons, drizzle with a little hot butter and scatter with chopped parsley.|