Bring the pot of water back to a light boil. Add 1 tsp vinegar and stir the water in a circle, creating a vortex. Crack the egg into a small bowl, then pour the egg into the center of the vortex. Keep lightly stirring the water as the egg poaches. At the two-minute mark, use a slotted spoon and remove the egg from the water. Repeat with the remaining tsp vinegar and egg.