Follow these simple steps to create your own Salted Caramel Apple Crumble Bars:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking dish.
2. Prepare the Crust: In a large bowl, combine the flour, rolled oats, brown sugar, cinnamon, baking soda, and salt. Stir to combine.
3. Add Butter: Pour the melted butter into the dry ingredients. Mix until the mixture is crumbly but holds together when squeezed.
4. Press into Pan: Take about two-thirds of the mixture and press it evenly into the bottom of the prepared baking dish. This will form your crust.
5. Make Apple Filling: In another bowl, toss the diced apples with lemon juice, sugar, cinnamon, and cornstarch until the apples are coated.
6. Layer the Apples: Spread the apple mixture evenly over the crust.
7. Prepare Salted Caramel Sauce: In a saucepan over medium heat, heat the granulated sugar. Stir until it melts and turns amber. Be careful not to burn it.
8. Add Butter & Cream: Once melted, add butter and whisk until combined. Slowly pour in the heavy cream while whisking continuously. Remove from heat and stir in sea salt.
9. Drizzle Caramel: Drizzle the salted caramel sauce over the apples in the baking dish.
10. Add Crumble Topping: Sprinkle the remaining crumble mixture evenly over the top of the apples and caramel.
11. Bake: Bake in the preheated oven for 35-40 minutes, or until the top is golden brown and the filling is bubbling.
12. Cool: Allow the bars to cool in the baking dish for about 20 minutes before cutting into squares.

These steps lay the groundwork for your scrumptious Salted Caramel Apple Crumble Bars, guiding you effortlessly through the baking process.