Best Curried Leek & Potato Soup

This leek and potato soup takes the classic French peasant pairing and runs it through a healthier, plant-forward lens. A whisper of mild curry powder and fresh rosemary plays against the natural sweetness of slowly sauteed leeks, and a pinch of arame seaweed (a Japanese kelp) adds a subtle ocean-mineral umami that makes the broth taste deeper than its short ingredient list suggests.

Wash the leeks aggressively. Sand and grit hide between the layers and a sandy soup is a ruined soup. Slice them lengthwise first, fan out the layers under cold running water, then chop.

The garlic and soy sauce go in only at the blending stage, not the simmer. This keeps the garlic raw and bright instead of cooked-mellow, and the soy sauce hits the soup with a clean, salty pop instead of getting lost in the long cook. Don’t skip this order.

Blend until completely smooth. A standard blender works but an immersion blender is easier. Reheat gently before serving so it doesn’t catch on the bottom.

Pro Tips

• Use a starchy potato (Russet or Yukon Gold) for the silkiest texture. Waxy potatoes make a thinner soup.
• For an even richer version, swirl in a tablespoon of olive oil or vegan cream just before serving.
• The soup thickens significantly as it cools. Thin with a splash of water or stock when reheating.

Variations

• Stir in a can of full-fat coconut milk for a richer, more pronounced curry profile.
• Top each bowl with crispy chickpeas or fried shallots for textural contrast.
• Add a peeled, diced apple along with the potatoes for subtle sweetness that pairs with curry.