Preheat your oven to 350°F and line a muffin tin with silicone liners or lightly grease with coconut oil.
In a large mixing bowl, whisk together the Greek yogurt, egg, egg whites, maple syrup, and vanilla extract until smooth.
In a separate bowl, sift together the oat flour, collagen peptides, cinnamon, nutmeg, baking powder, and sea salt.
Gently stir the dry ingredients into the wet mixture until just combined, being careful not to overmix.
Fold in the grated carrots until they are evenly distributed throughout the batter.
Divide the batter evenly among the muffin cups and bake for 18 to 22 minutes, or until a toothpick comes out clean.
Let the muffins cool in the tin for 5 minutes before transferring them to a wire rack to cool completely.