Preheat your oven to 350°F (175°C).

In a large bowl, combine the sliced peaches with half of the brown sugar and cinnamon, then pour this mixture into a greased baking dish.

In another bowl, mix together the rolled oats, flour, the remaining brown sugar, melted butter, and salt until it’s crumbly.

Sprinkle the oat mixture over the peaches in the baking dish.

Bake for 30-35 minutes or until the topping is golden brown and the peaches are bubbling.

Let it cool slightly before serving.