For the freshest poached eggs, use eggs that are as fresh as possible. Fresh eggs have thicker whites, which hold their shape better during poaching. If you don't have farm-fresh eggs, you can still achieve excellent results by straining store-bought eggs through a fine-mesh sieve to remove the watery part of the egg white. The optional vinegar helps the egg whites coagulate faster, resulting in a neater poached egg. A gentle whirlpool helps the egg white wrap around the yolk, creating a rounder, more uniform shape. Do not overcrowd the pan. Poach eggs in batches if necessary to maintain the water temperature and prevent sticking. For a richer flavor, try using chicken stock instead of water. Serve immediately for the best texture and flavor. If needed, you can keep poached eggs warm in a bowl of warm water for a short period of time.