Add oil, when hot add shallot and garlic and sauté for a couple minutes

Add red wine and reduce by half or until syrupy

Adds beef stock and rosemary and reduce by half and salt and pepper to taste

Once slightly thick remove and run through a sieve and back to the pot, let it cool a little and add a couple pats of butter and whisk until combined if not think mix a tsp of corn starch and sauce and add back to the burner until thick.