Chestnut Pie

I pressure cooked dried chestnuts with sugar syrup i.e. 1 water to half sugar. For maybe an hour?
I baked blind some pastry (I used packet pastry as I was in a rush to take this pie to a birthday BBQ- NEVER use packet pastry as it tastes like old cardboard) anyway.
Whizzed up the chestnuts and added some butter and three eggs whisked. (might have to let the mixture cool down before adding the eggs) and filled the pastry and chucked back in the oven for about 45 mins at 180.