I will present a very simple scenario where a Yukawa interaction causes
metastable halos to form in the early Universe. When the halo collapses a fireball
results with a temperature above that of the electroweak symmetry breaking scale.
This fireball is functionally similar to an electroweak bubble, except the inside is
where sphalerons are unsupressed. I then give a concrete scenario where the
baryon asymmetry can be produced.