Pistachio Paste:
1. Mix pistachio kernels and sugar in food processor and stir for 1 minute at high speed;
2. Add in water and butter, stir until smooth;

Biscuit Crust:
1. Combine the butter, sugar and salt and stir evenly;
2. Add in milk by several times;
3. Blend in plain flour and chopped pistachios, stir evenly;
4. Spread the batter on baking sheet, then bake in oven for 20 minutes, upper element 200℃, lower element 150℃

Cheesecake:
1. Ground 50g biscuit into crumbs, melt the butter and blend into the crumb, stir well;
2. Blend the cream cheese and sugar, heat until becoming smooth;
3. Add in sugar and stir well;
4. Add in egg and stir well;
5. Add in pistachio paste and blend well;
6. Add in whipping cream and blend well;
7. Put the batter into 6 inch mold;
8. Baking: water bath, upper element 180℃, lower element 100℃, bake for 60 minutes;
9. Cool it down for serving.