Paleo pear and aubergines cake

Ingredients for 8 portions:
1 eggplant
125 g almond flour
125 g coconut flour
60 g maple syrup
80 g coconut oil
3 tsp cinnamon powder
3 medium eggs
8 g baking powder
2 tbsp lemon juice
pinch of salt
1 pear in cubes
Cook 170 C for 1 hour