Preheat oven to 375 degrees.
Peel peaches and cut into chunks.
Mix peaches with the juice of 1/2 a lemon, the cornstarch, and 1 tbsp sugar.
In a separate bowl, mix the rolled oats, almond flour, 1 tbsp sugar, brown sugar and melted butter.
Coat a 8x8 or 9x9 pan with cooking spray or butter and then pour the peach mixture into the pan.
Layer the oat mixture evenly on top.
Bake for 25 minutes or until desired consistency of peaches.
Cool for ten minutes and serve!