I add a dash of cider or white wine vinegar to a pan of water
@MrsA2, season with a pinch of Maldon sea salt and bring to a gentle simmer. Crack each egg into a cup, make a whirlpool with a fork and drop in my egg.
A really soft poached egg takes around 2 minutes, while a firm one needs up to 4 minutes, especially if you're using it straight from the fridge.
When your egg is ready, remove it with a slotted spoon and place it on a warm plate to dry off. This produces a perfect round shape with a pretty seam down the middle.
I like to sprinkle my poached eggs with chopped, flat-leaf parsley, top with a pat of butter and season both eggs and avocado with a good grinding of black pepper.
For best results, use absolutely fresh eggs.