Whenever I cook with avocados, I conjure up the flavors of Mexico, which really works out well, because bright and flavorful ingredients such as lime, cilantro and spice are just what it takes to bring out the best in creamy avocados.
You can serve this soup chilled, but the flavors are much more pronounced and vibrant if you keep it hot.
Trim the root end of the leek, cut off the tough green leaves, cut the leek in half lengthwise and rinse well to remove any grit. Roughly chop the leek.
Heat the olive oil in a large pot or Dutch oven over medium-high heat. Add the leek, celery and onion, and cook for about 5 minutes or until the vegetables soften. Add the bay leaves, stock, coriander, cumin, avocado and lime juice and simmer for about 10 minutes.
Season with salt and pepper to taste. Ladle into bowls and serve topped with the chopped scallions and cilantro to taste. More from Dave Lieberman: