You can make this in a casserole dish or in a 9 x 4 inch loaf pan / 6-7 inch square pan. If you want to remove it from the dish and serve , line with parchment paper with two opposite sides long enough to hang over the pan edges ( so you can pull the dessert out after chilling )
Peel the mangoes and slice the flesh into thin strips ( doesn't have to be equal)
Pour your cream into the mixing bowl and place with bowl along with beaters or whisk in the freezer for 15 minutes
Beat the cream for a couple of minutes , then add the sugar and beat well until you have firm peaks . If you upturn the bowl, the cream shouldn't move.
In your prepared pan , place your biscuits . I used a 9x 4 inch loaf pan and placed the biscuits in 4 rows of 2 biscuits each. You can place as many biscuits as the size of dessert you want to make.
Spread about 1/2 cup of whipped cream on top and spread the sliced mangoes covering the cream uniformly.
Place another set of biscuits in the same manner and top with cream and sliced mangoes.
Repeat once more.
You can now place the last layer of cookies and cover with the remaining cream. You can decorate with any mango slices remaining / crushed biscuits if you wish.
Cover and chill for at least 3 to 4 hours or upto a day .
You can serve this chilled and slice directly from the pan . You can also freeze the pan for about an hour before serving , remove using the parchment paper and slice.
This can be served frozen as well !