Start by grating the zucchini with a box grater or a food processor until you get 2 cups. Squeeze the zucchini to remove moisture, by placing it between paper towels or a clean tea towel. Set aside.
Mix together the other wet ingredients: eggs, brown sugar (or coconut sugar), molasses, oil, milk, vinegar, and bran. Let it sit for 10 minutes. If you are using any kind of bran cereal let it sit for at least 1 hour until it is soggy.
In a small bowl place the flour, baking soda, baking powder, and sea salt, and stir well.
Add the flour mixture and the grated zucchini to the bran mixture, and stir only until mixed. In a greased muffin tray or a muffin tray with liners, place ⅓ cup of muffin batter into each muffin cup (they will be full). Sprinkle chopped pumpkin seeds on top if using!
In a preheated oven bake the muffins at 425 F for 7 minutes, then turn down the temperature to 375 F and bake for another 12-15 minutes until they are fully cooked.
Remove the muffins from the oven, let them sit in the pan for 5 minutes, then remove the muffins to fully cool on a cooling rack.