Oatmeal Cookie - With Apple And Pears

Oatmeal Cookie

Okay, this is not the most diet-friendly recipe, but it only contains 450 calories.
It is really delicious and moderately easy to prepare:

Ingredients:
1 apple
2 pears
80g oatmeal
350ml lemonish water (add one lemon's juice to half a liter of water to make it)
25ml lemonish water
150g melted ghee (or butter)
150g birch sugar
2 eggs
1 tsp baking soda
1 teaspoon ginger powder
200g walnut flour (ground walnut)

For the crunchy crumbs: