Fennel can be sweet, herbal, citrusy, and lightly licorice-like, sometimes all in the same spoonful. That range is exactly why it makes such interesting soup.

A good potato soup should taste like more than potatoes and cream. It should have depth, a little lift, and the kind of texture that makes every spoonful feel complete. Yukon Gold potatoes make that easier because they sit in the sweet spot between waxy and starchy. They hold some shape, blend beautifully, and bring a naturally buttery flavor even before the dairy goes in.

Leeks have a quiet way of making soup taste as if it simmered longer than it did. They sit somewhere between onions and garlic, but softer, sweeter, and more herbal. When cooked slowly, they turn silky. When browned a little, they bring a mild savory depth that feels cozy without being heavy.