Plum & Apple Crumble Tart

This delicious little tartlet recipe will fill the house with the smells of Autumn.

2 1/3 cups all-purpose
3/4 cup chilled butter, cubed, plus extra for greasing
2 tbsp sugar
1 tbsp icing sugar
1 egg (yolk and white separated)
2 apples (peeled, cored and sliced)
6 plums (stones removed and thinly sliced)
Zest of half a lemon
1 ½ cups Jordans Bursting with Nuts Morning Crisp (or your choice of Jordans cereal)
½ tsp ground cinnamon
¼ cup brown sugar (+ 3 tbsp)