Instructions

1. 1
   Preheat the oven to 190°C (375°F).
2. 2
   Grease a 1-litre casserole dish.
3. 3
   Beat the egg yolks and sugar in a bowl until light and fluffy and pale in color.
4. 4
   Very finely grate the carrot and apple, then squeeze out and discard all the liquid.
5. 5
   Mix the grated carrot, apple, orange rind, orange and lemon juice, and flour.
6. 6
   Combine the egg and carrot mixtures.
7. 7
   Whip the egg whites until they are very stiff, and fold into carrot mixture.
8. 8
   Spoon mixture into the greased casserole dish.
9. 9
   Bake for 35 minutes or until golden brown.