A delicious sauce perfect with game meat.
Melt butter in a small saucepan and saute onions, shallot and garlic until soft and aromatic.
Add red wine and plum sauce to the saucepan, stir and bring to the boil.
Leave the sauce to boil and reduce by at least half.
(should take 20-30 minutes)
When ready the sauce should have the consistency of warm honey and a glossy sheen.
Strain the sauce into a bowl using a metal sieve.
The smooth sauce will be ready for serving.