Lime, Almond and coconut slice

1 1/4 cups each icing sugar and almond meal
1/2 cup plain flour
1/4 cup des coconut
grated zest and juice of 1 lime
200g butter melted
1tsp vanilla extract
6 egg whites lightly beaten
1/2 cup flaked almonds.

Preheat oven to 180c.  Line a 20x30cm lamington pan.
Combine icing sugar, almond meal, flour and coconut in a bowl.
Add zest and juice, butter and vanilla and mix well.  Add eggwhites.  Beat until just combined.
Pour into pan and sprinkle with almonds and bake for 20-25mins.  Cool before turning out.  Dust with icing sugar.