Place the chicken breasts in a large pot and cover with water (optional: add salt, pepper, bay leaf, or garlic cloves for extra flavor).
Bring the water to a boil, then reduce to a simmer.
Cook the chicken for 15-20 minutes, or until fully cooked and the internal temperature reaches 165°F (75°C).
Remove the chicken from the pot, let it cool slightly, then chop or shred.