Preheat your oven to 375 degrees f.
Spray or rub very lightly an 8 or 9 inch round baking dish with coconut oil.
In a large bowl, add all the ingredients and stir gently to combine well.
Using a rubber spatula, pour your oatmeal mixture into the prepared 8 or 9 inch round baking dish, then level it nicely as shown in the photos by gently patting or spreading with your rubber spatula.
Bake for 40-50 minutes in your preheated oven, or just until the top is golden. Keep an eye on it those last few minutes.