Dark chocolate and walnut tart with crème fraîche ice cream

150g of walnuts, roughly chopped

75g of dark chocolate

175g of Demerara sugar

150g of golden syrup

6 eggs

261g of plain flour

100g of icing sugar

30g of ground almonds

150g of caster sugar

2 chocolate sablé biscuits

50g of butter

2 tsp milk

125g of unsalted butter

250ml of crème fraîche

120ml of whole milk

40ml of lemon juice