Preheat the oven to 350℉ (175C/155C Fan) and prepare your muffin pan. Either grease and flour this well, spray with a non-stick cooking spray or line with muffin cases.
In a large mixing bowl, whisk together the oil, sugar, vanilla extract, egg and yolk, pineapple and grated squash.
½ cup flavorless oil, 1 cup granulated sugar, 1 teaspoon vanilla extract, 1 large egg, 1 egg yolk, 4 oz crushed pineapple, 1 cup yellow squash
Once mixed together sift the dry ingredients into the bowl - the flour, baking soda, salt and spices.
1½ cups all purpose flour, ½ teaspoon ground cinnamon, ¼ teaspoon ground nutmeg, pinch ground cloves, 1 teaspoon baking soda, ½ teaspoon salt
Use a spatula to stir the mixture together, ensuring that there are no pockets of unmixed flour.
Spoon the batter into your prepared muffin tray and bake in the centre of the preheated oven until risen and golden (about 25-30 minutes). Check the muffins are done by using a toothpick or skewer inserted into one of the central muffins. This should come out clean.
Remove from the oven and allow to cool in the pan for about 10 minutes before carefully removing and placing on a wire rack to cool completely.