I can't have no affair because it's wrong pie (Vanilla Meringue & Banana)

Recipe of "Waitress", the movie.

INGREDIENTS:
200g digestive biscuits, crushed
125g demerara sugar
125g butter, melted
2 large eggs
200g caster sugar
1/2 teaspoon salt
500ml milk, scalded
1/2 teaspoon vanilla extract
1/4 teaspoon ground cinnamon
1 banana (optional)
3 egg whites

PREPARATION:
1. In a medium bowl, mix the digestive biscuits, brown sugar and melted butter together until well blended. Press the crumb mixture into a 23cm (6cm deep) loose-based tin. Preheat the oven to 220C.

2. In a large bowl, lightly beat the eggs. Mix in 75g of the caster sugar and the salt. Slowly stir in the hot, scalded milk and the vanilla extract. Strain the mixture into the pie crust and sprinkle the cinnamon on top.

3. Bake on the lower shelf of the pre-heated oven for 25 to 30 minutes or until the curstard is firm.

4. In a large glass mixing bowl, whisk the egg whites until stiff but not dry. Gradually beat in the remaining caster sugar, whisking well between each addition until very stiff and shiny.

5. Scatter the banana over the custard (if using). Spread the meringue on top of the pie, return to the oven and cook until the meringue is slightly brown. Cool for at least 15 minutes befor cutting.