Slice the ends of your zucchini and use a microplane grater to finely grate the entire vegetable. Set that aside
Add the 2/3 cup oats and 2 cups water to a very large bowl. Microwave this for 1-2 minutes (depending on the strength of your microwave)
Add 1/2 of the zucchini to the oats, stir and put in the microwave for 2-3 minutes, or until the oatmeal starts to expand and puff up (stop microwaving when it looks like the bowl is about to overflow).
Stir and add the remaining zucchini, stir to full incorporate. Microwave again for 2-3 minutes, or until the oatmeal begins to expand again. The key to thick oatmeal is letting is bubble and look like it might overflow, then stopping it right beforehand.
When the oatmeal has thickened, remove from the microwave and add in the maple syrup and salt (the salt will help the sweetness!)
And go crazy with the toppings - I like chocolate granola or any nut butter, but it's really up to you!