In a medium bowl, combine the first five ingredients.
In a second bowl, whisk together the milk, melted coconut oil or butter and egg and vanilla extract.
Add the wet ingredients to the dry. Stir to combine.
Spray an 8x8 baking dish with cooking spray. Pour the oatmeal mixture into the prepped dish. Top with fresh peach slices. Bake 20-25 minutes or until the edges are bubbly and slightly browned.
Serve warm. Top with additional peaches, pecans, brown sugar or maple syrup, if desired. Store leftovers covered in the refrigerator for up to 4 days.
Notes
Recipe adapted from http://www.myrecipes.com/recipe/baked-oatmeal