Preheat oven to 350F. Lightly coat an 8-inch or 9-inch square pan or 1.5-quart baking dish with cooking spray or melted coconut oil.
In a medium bowl, toss together the peaches, 2 tablespoons of coconut sugar, arrowroot, lemon juice, vanilla, cinnamon, nutmeg, and a pinch of salt.
Spoon peach filling and juice into the prepared baking dish and bake for 10 minutes. Remove from the oven and set aside. Leave the oven on (350F).
While the peaches are baking, prepare the biscuit topping. Using the same medium bowl (uncleaned, you want to use any peach juice that was left behind) combined all of the biscuit ingredients. The dough will be slightly sticky. Take a heaping spoonful of the dough and gently flatten out the dough using your hands. Place the dough disc on top of the peach filling. The dough will not completely cover the entire pan, there will be exposed peach filling.
Bake for an additional 35-40 minutes, or until the biscuit is golden brown and an inserted toothpick of the center of the biscuit comes out clean and the peach filling is bubbling.
Let it sit for 5-10 minutes before serving.
Serve warm.
Cover and store leftovers in the refrigerator for up to 5 days.