Preheat the oven to 375F.
Add the diced peach to a ramekin and mix with the maple syrup.
In a separate bowl, mix the oat flour, walnuts, brown sugar, salt, cinnamon, baking powder and milk.
Pour the oat mixture on top of the peaches.
Bake for 35 to 45 minutes, keeping a close eye on the crisp as it bakes, to watch for burning. It should be golden and bubbly.
Optionally, serve with a scoop of vanilla ice cream on top and enjoy!
