  A minimal non-thermal dark matter model that can explain both the existence
of dark matter and the baryon asymmetry in the universe is studied. It requires
two color-triplet, iso-singlet scalars with $\mathcal{O}$(TeV) masses and a
singlet Majorana fermion with a mass of $\mathcal{O}$(GeV). The fermion becomes
stable and can play the role of the dark matter candidate. We consider the
fermion to interact with a top quark via the exchange of QCD-charged scalar
fields coupled dominantly to third generation fermions. The signature of a
single top quark production associated with a bottom quark and large missing
transverse momentum opens up the possibility to search for this type of model
at the LHC in a way complementary to existing monotop searches.
