To make these bars, start by preheating your oven to 350 F.
Next, prepare the zucchini by washing and grating it. Then, once the zucchini is grated, place it into a mesh bag or cheesecloth. If you don't have either, you can wrap it tightly in paper towels. Squeeze out as much moisture as you can from the zucchini, then set aside.
Next, in a large bowl, mix together the oats, gluten-free flour, coconut sugar, baking soda, sea salt, vanilla extract, egg, and melted coconut oil until they're fully combined and a dough is formed. It will be crumbly but that is okay!
Then, add in the zucchini, walnuts, and chocolate chips and mix until fully combined.
Once the dough is finished, set it aside and line an 8x8 baking dish with parchment paper. I like to spray the inside of the pan with a little bit of oil, in order to ensure that the parchment paper sticks to it.
Then, add the dough to the dish, pressing it down until it's evenly spread across the pan.
Bake the bars for 26-28 minutes, or until the tops of the bars are golden and a toothpick comes out clean.
Once they're done, remove the bars from the oven and let them cool completely before removing them from the baking dish. This is very important so that the bars hold together!
Finally, once the bars have cooled, remove them from the pan and slice them. You can make 9 larger bars, or 12 smaller bars, if you prefer. Then, serve and enjoy! Store any leftovers in an airtight container, in the fridge, for up to one week.