In a large mixing bowl, combine the melted butter and maple syrup. Beat them with a whisk until they are combined.

Add the oakmilk, baking soda, cinnamon, vanilla, salt and nutmeg, and whisk to blend. Switch to a big spoon and stir in the zucchini (be sure to squeeze excess moisture out of the zucchini first). Add the flour and stir just until combined. Gently fold in the toasted nuts now, if using.

Bake for 55 to 60 minutes, or until a toothpick inserted into the center comes out clean and the center of the loaf springs back to the touch. Let the bread cool in the pan on a wire rack. Use a serrated knife to cut individual slices.