There are a few ways to poach eggs, but this way works well and you can make the poached eggs ahead. Fill a large bowl with ice water and ice, and set aside. Pour enough water into a large skillet to reach a depth of 1 inch. Bring water to a slow simmer over medium heat. Add 3 tablespoons vinegar to the skillet. Carefully crack each egg into individual ramekins. Gently slide 1 egg at a time into simmering water. Cook until whites are just set, about 3 -4 minutes. Using a slotted spoon, very gently transfer eggs to the bowl with ice water, being careful not to break eggs.