Beat the egg yolks in a large bowl, set the bowl aside.
Combine all ingredients but egg yolks in a heavy saucepan on medium heat.
Bring to boil.
Turn the heat down just slightly so you don't have an angry boil but a gentle boil.
Boil gently until thick and smooth. (about 3-4 minutes)
Stir often.
When thick and smooth remove the whole vanilla bean and pour the hot chocolate mixture into egg yolks.
Beat together until smooth and creamy.
Divide amongst 4 ramekins.
Cover and cool for 4 hours or overnight.
Serve with whipped cream and fresh berries.