  We consider associated production of squarks and gluinos with the lightest
supersymmetric particle (LSP), or states nearly degenerate in mass with it.
Though sub-dominant to pair production of color SU(3)-charged superpartners,
these processes are directly sensitive to the wavefunction composition of the
lightest neutralinos. Exploiting event-shape variables -- including some
introduced here for the first time -- we are able to identify the composition
of the LSP by selecting events involving a single high-pT jet recoiling against
missing transverse energy. We illustrate the proposed technique on a set of
benchmark cases and propose methods for applying these results in more
realistic experimental environments.
