  Extreme outbursts in young stars may be a common stage of pre-main-sequence
stellar evolution. These outbursts, caused by enhanced accretion and
accompanied by increased luminosity, can also strongly impact the evolution of
the circumstellar environment. We present ALMA and VLA observations of EX Lupi,
a prototypical outburst system, at 100 GHz, 45 GHz, and 15 GHz. We use these
data, along with archival ALMA 232 GHz data, to fit radiative transfer models
to EX Lupi's circumstellar disk in its quiescent state following the extreme
outburst in 2008. The best fit models show a compact disk with a characteristic
dust radius of 45 au and a total mass of 0.01 M$_{\odot}$. Our modeling
suggests grain growth to sizes of at least 3 mm in the disk, possibly spurred
by the recent outburst, and an ice line that has migrated inward to $0.2-0.3$
au post-outburst. At 15 GHz, we detected significant emission over the expected
thermal disk emission which we attribute primarily to stellar (gyro)synchrotron
and free-free disk emission. Altogether, these results highlight what may be a
common impact of outbursts on the circumstellar dust.
