  Gradients in the mass-to-light ratio of distant galaxies impede our ability
to characterize their size and compactness. The long-wavelength filters of
$JWST$'s NIRCam offer a significant step forward. For galaxies at Cosmic Noon
($z\sim2$), this regime corresponds to the rest-frame near-infrared, which is
less biased towards young stars and captures emission from the bulk of a
galaxy's stellar population. We present an initial analysis of an extraordinary
lensed dusty star-forming galaxy (DSFG) at $z=2.3$ behind the $El~Gordo$
cluster ($z=0.87$), named $El~Anzuelo$ ("The Fishhook") after its partial
Einstein-ring morphology. The FUV-NIR SED suggests an intrinsic star formation
rate of $81^{+7}_{-2}~M_\odot~{\rm yr}^{-1}$ and dust attenuation $A_V\approx
1.6$, in line with other DSFGs on the star-forming main sequence. We develop a
parametric lens model to reconstruct the source-plane structure of dust imaged
by the Atacama Large Millimeter/submillimeter Array, far-UV to optical light
from $Hubble$, and near-IR imaging with 8 filters of $JWST$/NIRCam, as part of
the Prime Extragalactic Areas for Reionization and Lensing Science (PEARLS)
program. The source-plane half-light radius is remarkably consistent from $\sim
1-4.5~\mu$m, despite a clear color gradient where the inferred galaxy center is
redder than the outskirts. We interpret this to be the result of both a
radially-decreasing gradient in attenuation and substantial spatial offsets
between UV- and IR-emitting components. A spatial decomposition of the SED
reveals modestly suppressed star formation in the inner kiloparsec, which
suggests that we are witnessing the early stages of inside-out quenching.
