In a bowl, stir together all of the ingredients besides the peaches. For the peaches, peel the skin from the peach and remove the pit. Dice the peaches into bite sized pieces. Add to the oat mixture. Turn the heat to 350 degrees. Spray a 9x13 pan and pour the mixture into the pan. Place the oatmeal in the oven and bake for 15-18 minutes, or until lightly golden brown.
When the oatmeal is done, serve with more fresh peach pieces and milk as desired. If you like it more sweet, you can add a little brown sugar on top. Chopped nuts are great on top too.