  We report the evolution of the $k$-space electronic structure of lightly
doped bulk Ca$_{2}$RuO$_{4}$ with uniaxial strain. Using ultrathin plate-like
crystals, we achieve strain levels up to $-4.1\%$, sufficient to suppress the
Mott phase and access the previously unexplored metallic state at low
temperature. Angle-resolved photoemission experiments performed while tuning
the uniaxial strain reveal that metallicity emerges from a marked
redistribution of charge within the Ru $t_{2g}$ shell, accompanied by a sudden
collapse of the spectral weight in the lower Hubbard band and the emergence of
a well defined Fermi surface which is devoid of pseudogaps. Our results
highlight the profound roles of lattice energetics and of the multiorbital
nature of Ca$_{2}$RuO$_{4}$ in this archetypal Mott transition and open new
perspectives for spectroscopic measurements.
