Pista Kesar Kulfi

4 cups full cream milk
A few strands of saffron
¼ cup sugar
2 tbsp cornflour
75 gms khoya grated and mashed slightly[3/4 cup]
1 tbsp almonds-very finely cut
3-4 crushed small green cardomoms

Dissolve cornflour in 1 cup milk and keep aside. Boil rest of the milk with saffron in a kadai till it is reduced to half in quantity for about 25-30 minutes in medium fire scraping the sides.Add sugar and cornflour paste.boil.cook for 2-3 minutes more till the sugar is well dissolved.Remove from fire.cool slightly.Add khoya,almonds,pista,and crushed cardomoms.Fill the mixture in the kulfi moulds.freeze it for 6-8 hours or overnight.