  We consider the existence of an "inflaton" described by an homogeneous scalar
field in the Szekeres cosmological metric. The gravitational field equations
are reduced to two families of solutions which describe the homogeneous
Kantowski-Sachs spacetime and an inhomogeneous FLRW(-like) spacetime with
spatial curvature a constant. The main differences with the original Szekeres
spacetimes containing only pressure-free matter are discussed. We investigate
the stability of the two families of solution by studying the critical points
of the field equations. We find that there exist stable solutions which
describe accelerating spatially-flat FLRW geometries.
