Bring the water to
the boil in a large saucepan. Prick the bratwurst
all over and carefully lower it into the boiling
water. Boil over a medium heat for about 5 to 7
minutes. Drain off the water and discard.
Add half
the butter to the sausage, increase the heat and
brown the outside very quickly all over. Lower the
heat and add the bay leaves and half the ale.
Cover and simmer until the ale has reduced by half.
In a frying pan, melt the remaining butter, fry
the chopped onion until golden,
then stir in the flour and continue stirring and
cooking until the mixture turns light brown. Quickly
blend in the remaining ale, stirring all the time,
to form a light and creamy smooth sauce. Season with
salt and pepper and add to the sausage mixture.
Stir well to ensure the sausage is well coated with
the sauce. Simmer on low heat until the sausage is
cooked and the sauce thickens. Garnish with parsley
and serve with cabbage and potatoes.