Melt coconut oil (if using) and brown sugar together. Add these and the vanilla to the dry ingredients. Toss to combine.
Spray a baking sheet with nonstick spray, then spread out granola mixture. Bake at 225 for about 1 1/2 - 2 hours until peaches are dried but still soft (baking time will vary depending on thickness of peach pieces), stirring a couple of times. Let cool completely then store in airtight container.
I am not a health professional and nutrition data is calculated programatically. Accuracy may vary with product selection, calculator accuracy, etc. Consult a professional for the best information.