  Temporal cavity solitons in ring microresonators provide broad and
controllable generation of frequency combs with applications in frequency
standards and precise atomic clocks. Three level media in the {\Lambda}
configuration inside microresonators displaying electromagnetically induced
transparency can be used for the generation of temporal cavity solitons and
frequency combs in the presence of anomalous dispersion and two external
driving fields close to resonance. Here, domain walls separating regions of two
dark states due to quantum interference correspond to realizations of
stimulated Raman adiabatic passage without input pulses. With no need of
modulational instabilities, bright temporal cavity solitons and frequency combs
are formed when these domain walls lock with each other. Wide stability ranges,
close to resonance operation and optimal shape of the cavity solitons due to
three-level quantum interference can make them preferable to those in two-level
media.
