Preheat oven to 180 degrees C. Grease 2 medium sized loaf tins.
In a large bowl, combine eggs, white sugar, brown sugar, oil and vanilla until well blended. In a separate bowl, combine flour, bicarbonate of soda, salt and cinnamon. Stir flour mixture into egg mixture. Fold in walnuts, zucchini and apple. Pour into prepared tins.
Bake 1 hour, or until top springs back when touched lightly in centre. Let cool in tins 10 minutes before removing to wire rack to cool completely.