Preheat oven to 375F and grease an 8×8 casserole dish.
In a large bowl, mix together rolled oats, chia seeds, baking powder, cinnamon, and salt.
In a medium bowl, stir together the almond milk, greek yogurt, egg whites, maple syrup, and vanilla.
Add the wet mixture to dry mixture and stir until combined.
Fold in the peaches.
Pour mixture into baking dish and press down lightly.
Bake, uncovered, for 40-45 minutes, until lightly golden brown.
Let cool for 5 minutes, slice, then serve!
Store in refrigerator.