Ingredients

4 cups water
1 pound boiling potatoes, peeled and diced
1 medium onion, diced
1 1/2 teaspoons kosher salt, more to taste
2 leeks, white and light green parts, washed and diced
1/3 pound cod fillet, diced
1/3 cup chilled unsalted butter, diced
2 tablespoons minced fresh chives
4 teaspoons cognac or brandy (optional)
1/4 teaspoon freshly ground black pepper

Description

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