2large leekswhite and light-green parts only, thinly sliced
4clovesgarlicroughly chopped
1½tsppink salt
1lbHannah sweet potatoespeeled and diced
4cupschicken stock
¼tspcrushed hot pepper flakesoptional
142gbag baby arugula
1tsplemon zest
2tbspfreshly squeezed lemon juice
4soft-boiled eggsfor garnish (optional)
Maldon flake saltfor sprinkling
Instructions
Heat 2 tbsp of the oil in large saucepan over medium-high heat. Add leeks, garlic and salt and sauté for 5 minutes, until leeks are soft but not brown.
Add sweet potatoes, stock and crushed hot pepper flakes (if using). Stir, then bring to a boil. Cover, reduce heat and simmer gently for 20 minutes, until potatoes are very tender. Turn off heat and add arugula. Stir for 1 minute, until wilted.
Add remaining 2 tbsp oil, lemon zest and juice. Carefully transfer soup to a blender and blend until smooth. (Alternatively, use an immersion blender, but it won’t be as smooth.)
Ladle into bowls and top with soft-boiled eggs, if desired, and flake salt.