Theyve been serving it at McSorleys old Ale House in NYC (the oldest continually running bar in NYC, been going since 1850's the place is a Historical treasure, the only place in NY allowed to remain open during prohibition, Didnt allow women in until forced to do so in 1970) It is still run and frequented by the old Irish. They only serve their beer (two types -" light or dark" and you have to order in multiples of two) My father has been going there since the early 60's and met me there on my 21st bday (after I saw the Grateful Dead at the Meadowlands) after midnight first legal beer I had.
If youre in the city, GO!!
Home - McSorley's Old Ale House
here it is (it goes so great with the beer) :
mustard recipe:
Just mix up the colmans and use a light ale (preferably McSorleys) to get it to the consistency you want.