01 - Preheat oven to 350°F. Grease an 8×8-inch baking dish with butter or nonstick spray.
02 - In a large mixing bowl, combine rolled oats, ground cinnamon, ground nutmeg, baking powder, and salt. Stir until evenly distributed.
03 - Add finely grated carrots, raisins, and chopped walnuts to the dry mixture. Toss to coat and distribute evenly throughout.
04 - In a separate bowl, whisk together milk, eggs, maple syrup, melted coconut oil, and vanilla extract until smooth and well blended.
05 - Pour the wet mixture into the dry ingredients and stir gently until just combined. Avoid overmixing.
06 - Spread the oatmeal mixture evenly into the prepared baking dish, smoothing the top with a spatula.
07 - Bake for 35 to 40 minutes, until the center is set and the top is lightly golden brown.
08 - Allow to cool for 10 minutes before slicing into portions. Serve warm on its own or topped with a dollop of yogurt.