In a large pot over medium heat, cook the butter and leeks for 10-11 minutes, or until the leeks are wilted and very soft. Stir frequently; if they begin to brown, turn down the heat a bit.
3 T butter, 1 lb chopped leeks
Add the garlic and cook 60 seconds.
1 T garlic
Add the potatoes, broth, and seasonings. Bring to a boil over high heat, then immediately cover and reduce until just simmering (for me, this is low on my burner). Simmer for 15-20 minutes or until the potatoes are very tender.
2 lbs potatoes (russet or gold), 6 cups chicken broth, 1 teaspoon kosher salt, ½ teaspoon pepper, ¼ teaspoon red pepper flakes, 1 bay leaf
Remove from the heat. Remove the bay leaf. Then use an immersion blender to blend until the soup is very smooth. This may take several minutes.
Add the cream and stir well. Serve with crispy bacon.
½ cup heavy cream or half n half, Optional topping: Bacon