Preheat your oven to 350°F (175°C) and line a muffin tin with silicone liners or parchment paper.
In a large mixing bowl, whisk together the Greek yogurt, egg, vanilla extract, and maple syrup until the mixture is smooth.
Add the freshly grated carrots to the wet ingredients and stir until evenly distributed.
In a separate bowl, combine the oat flour, vanilla protein powder, cinnamon, nutmeg, baking powder, and sea salt.
Gradually fold the dry ingredients into the wet carrot mixture, stirring until just combined without over-mixing.
Divide the batter evenly among 4 to 6 muffin cups, filling them nearly to the top.
Bake for 18 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Allow the muffins to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely.