Take a fresh apple and make a cut on the top. Now cut around the seed area, take a spoon for twisting the seed and take it out.
To make the ice-cream mixture, boil the milk on medium flame. Let it boil and reduce to 1/3 of milk. Add sugar and let it boil for some time. Now milk will become thick in consistency, add condensed milk, nuts and boil it for another two minutes.
Switch off the flame now. Let the ice cream mixture cool down for a while.
Take the ice cream mixture, stuff it into the apple, close on top and freeze it for 5 hours.