Prepare the poaching liquid.
Bring about an inch of water to a boil in a small, deep skillet.
Add the salt and vinegar, then lower the heat until the water is at a gentle simmer, with only a few small bubbles breaking the surface.
Ready the eggs. One at a time, crack each egg into a separate small bowl or ramekin. This allows you to gently slide them into the water without breaking the yolk.
Cook the eggs. Carefully slip the eggs into the simmering water, one by one.
Cook for 3 to 5 minutes, or until the whites are completely set but the yolk is still soft and runny.
Drain and serve.
Using a slotted spoon, gently lift each egg out of the water. Allow it to drain for a moment before serving immediately over toast, greens, or your favorite base.