Preheat: Preheat your oven to 350°F (175°C) and grease an 8x8 inch baking dish.
Whisk Dry: In a large bowl, mix the oats, baking powder, cinnamon, ginger, nutmeg, and salt.
Whisk Wet: In another bowl, whisk together the milk, eggs, maple syrup, and vanilla.
Combine: Pour the wet ingredients into the dry. Stir in the grated carrots and half of the walnuts.
Bake: Pour the mixture into the prepared dish and top with the remaining walnuts. Bake for 35-40 minutes until the center is set.
Serve: Let cool for 10 minutes before slicing. Serve with a dollop of Greek yogurt or a drizzle of nut butter.