Preheat the oven to 375 degrees
Shred the zucchini then place it in a clean kitchen towel and squeeze the towel tightly over the sink to get rid of the extra moisture in the zucchini
In a high-speed blender blend oats, collagen protein, vanilla protein, melted coconut oil, eggs, milk, vanilla, cinnamon, baking powder, and salt until it forms a batter
Stir in zucchini with a spoon
Line a 9×7 or 8×8 pan with parchment paper
Pour batter into lined pan and top with chopped walnuts and a sprinkle of cinnamon
Bake until golden brown for about 35-40 minutes
Let cool and slice into bars (bigger for breakfast or smaller for snack size)
Enjoy topped with plain yogurt mixed with vanilla protein for frosting and a drizzle of nut butter or sprinkle of nuts