Add the chicken broth and frozen lima beans.
If the chicken breast is thicker than 1 inch, cut it horizontally into thinner pieces, then nestle the chicken into the broth.
Wash your hands and clean the knife, cutting board, and work surface after handling the raw chicken.
Bring the broth to a gentle simmer, reduce the heat to low, and cover.
Cook for approximately 12–18 minutes, turning the chicken halfway through, until its thickest part reaches 165°F.
Avoid a vigorous boil, which can toughen the breast meat.
Do not rinse raw chicken; keep it and its juices away from other ingredients, and wash hands and clean the knife, cutting board, and work surface after handling it.
Cook chicken to 165°F at its thickest part; clean the thermometer probe before and after checking.