Preheat oven to 180 degrees C. Lightly grease 4 mini loaf tins.
In a large bowl, beat together the eggs, oil, vanilla and sugar. Fold in the zucchini. Beat in the flour, salt, baking powder, baking soda and cinnamon. Gently fold in the blueberries. Transfer to the prepared mini-loaf tins.
Bake 50 minutes in the preheated oven, or until a skewer inserted in the centre of a loaf comes out clean. Cool 20 minutes in the tins, then turn out onto wire racks to cool completely.