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240 milliliters
Easy
20 min
Prepare your mise en place.
To make the reduction, combine 75 milliliters (¼ cup plus 1 tablespoon) of the water, the vinegar, shallots, peppercorns, and tarragon in a small saucepan over medium heat.
Bring to a simmer and simmer for about 5 minutes or until the liquid has been reduced by 80 percent. Remove the reduction from the heat and combine it with the egg yolks and