Preheat the oven to 180°C, grease the baking tray recesses or equip them with paper cups. Grate zucchini finely and cut pineapple pieces into small pieces.
In a bowl, mix the dry ingredients, i.e. flour, walnuts, baking powder and baking soda. In another bowl beat the eggs, add granulated sugar, oil, zucchini and pineapple pieces.
Add the dry ingredients and mix carefully.
Pour the dough into the wells and bake at 180°C for 20-25 minutes on the middle shelf.