Some recipes earn their place not through complexity but through consistency. You make them once, they turn out well, and before long they're just part of how you cook. This soup is one of those.

Leeks do the heavy lifting here. Given time and a little heat, they go from sharp and fibrous to something almost buttery, releasing a sweetness that becomes the backbone of the whole dish. The potatoes say very little on their own, but that's precisely the point - they dissolve quietly into the broth, adding substance and that unmistakable thick, spoonable quality that makes a soup feel like a proper meal.

Richness here doesn't come from a carton of cream. It comes from Greek yogurt, stirred in once the heat is off, along with a short pour of lemon juice. The yogurt rounds out the texture while the lemon cuts through it - a small but deliberate contrast that stops the soup from tasting flat. Both go in at the very end.

Blend it completely. Not mostly, not until it looks smooth enough - all the way through, until there's nothing left but a uniform, glossy soup. An immersion blender handles this well and saves you the trouble of transferring hot liquid anywhere. Pull the thyme sprigs out first. Everything else blends in and disappears exactly as it should.

Four bowls if it's the main event, six if you're starting a larger meal. It keeps well in the fridge and tastes better the next day once the flavors have had time to settle. Bread on the side is not optional.

If you have any left over, try it cold straight from the fridge with a drizzle of good olive oil on top. Something about the chill and the oil together brings out a completely different side of the soup - cleaner, almost refreshing. It might just become your preferred way to eat it.