Making Cinnamon Oat Peach Crisp is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and grease a baking dish.
2. Prepare Peaches: In a large bowl, combine the sliced peaches with lemon juice, vanilla extract, and half of the brown sugar. Toss to coat the peaches evenly.
3. Spread Peaches: Layer the peach mixture evenly in the greased baking dish.
4. Mix Topping: In another bowl, combine the rolled oats, remaining brown sugar, flour, cinnamon, salt, and nutmeg (if using). Mix well.
5. Add Butter: Pour the melted butter into the oat mixture and stir until fully combined and crumbly.
6. Top Peaches: Spread the oat topping evenly over the peaches in the baking dish.
7. Bake: Place in the preheated oven and bake for 30-35 minutes, or until the topping is golden brown and the peaches are bubbly.
8. Cool: Once done, remove from the oven and let it cool for about 10 minutes before serving.

These simple steps will guide you in creating this incredible dessert effortlessly.