Peel and finely chop the apples
Soak sago in water for 15 minutes
Cook the sago in a pan adding enough water till transparent
Drain it and keep it aside
Heat butter/ghee in a thick pan and add chopped apples and saute for 2 minutes
Add milk and cooked sago into this and cook till it becomes thick and reaches the required consistency
Add condensed milk , mix well and cook for 2-3 minutes
Pour the prepared payasam into a serving bowl and garnish with chopped badam
Serve hot