Peel and slice the mangoes into small peices.
Keep ready a 11x7 inch deep pan (refer notes).
Whip cream till soft peaks. Add the condensed milk, salt and vanilla and beat till stiff.
Keep milk ready in a deep plate. Dip graham crackers in the milk and layer the bottom till packed.
Spread 1/3rd of the whipped cream mixture and sprinkle 1/3 of the mangoes.
Top with more graham crackers dipped with milk. Spread half of the remaining cream mixture and mangoes.
Repeat a third layers with dipped graham crackers, all the remaining cream mixture, finishing off with the remaining mangoes on top.
Wrap with cling film and refrigerate for a couple of hours to set.
Before serving, crush some graham crackers on the top. Dig in!