A clear broth with delicate garnishes

A trainee is preparing a clear beef broth for a Korean meal and wants separate vegetable and egg-garnish colors to remain visible. The beef has been put on to extract flavor, but the trainee increases the heat until the liquid rolls vigorously and repeatedly stirs surface foam back into the pot. Delicate vegetables are added at the same time as dense root pieces, and the entire mixture is left cooking while the egg garnish is prepared. A colleague suggests that all broths should look milky because a longer boil always produces better quality. The intended dish specification instead asks for a clear broth with distinct ingredient textures. The trainee must choose controls that fit that stated result.