Creating Peach Crumble Bars is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking dish.
2. Prepare Peaches: In a mixing bowl, combine sliced peaches with lemon juice and ¼ cup of sugar. Set aside to marinate.
3. Make the Crumble: In another bowl, mix flour, rolled oats, melted butter, remaining sugar, cinnamon, and salt until crumbly.
4. Layer the Peaches: Spread half of the crumble mixture evenly in the bottom of the prepared baking dish.
5. Add Peaches: Evenly distribute the marinated peaches over the crumble layer.
6. Top with Crumble: Sprinkle the remaining crumble mixture over the peaches, ensuring even coverage.
7. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown.
8. Cool: Remove from the oven and let it cool for 10-15 minutes before slicing into bars.
9. Serve: Enjoy warm or at room temperature, optionally topped with whipped cream or vanilla ice cream.

These steps will guide you in creating these incredible Peach Crumble Bars effortlessly.