Preheat your oven to 350°F (175°C) and grease an 8×8-inch baking dish.

In a medium bowl, toss sliced peaches with cornstarch, maple syrup (or honey), cinnamon, and vanilla extract.

Combine oats, flour, brown sugar, cinnamon, and salt in a separate bowl. Then mix in melted butter or coconut oil until crumbly.

Sprinkle the oat mixture evenly over the peach filling in the baking dish.

Bake for 30–35 minutes until the topping is golden brown and the peach mixture is bubbling.

Let cool for about 10-15 minutes before serving.