  We study the shadow cast by rotating black holes surrounded by plasma in the
context of the 4D Einstein-Gauss-Bonnet theory of gravity. The metric for these
black holes results from applying the Newman-Janis algorithm to a spherically
symmetric solution. We obtain the contour of the shadow for a plasma frequency
model that allows a separable Hamilton-Jacobi equation. We introduce three
observables in order to characterize the position, size, and shape of the
shadow.
