Preheat the oven to 350°F. Line muffin tins with liners or spray with cooking spray.
In a large mixing bowl, combine oats, almond meal, cinnamon, baking soda, nutmeg, and salt.
Combine the shredded zucchini and carrots with the eggs, melted olive oil butter, maple syrup, almond milk, and vanilla extract in a separate mixing bowl.
Make a well in the dry ingredients and add the wet ingredients. Mix a few times until ingredients are loosely incorporated. It’s alright if there are some bumps in the batter.
Add the chopped walnuts and chocolate chips. Fold the mix-ins into the batter until loosely incorporated.
Scoop a few spoonfuls of batter into the muffin tins. It’s okay to fill the tins to the top, as these will not rise very much when baked.
Bake muffins about 16 to 18 minutes. Be careful not to over-bake, as these muffins will dry out quickly. Test for doneness using a toothpick. It should come out clean from the center.
Let the muffins cool inside their tins for a few minutes before transferring to a baking rack to finish cooling.