1-First, preheat your oven to 350°F (175°C) and coat a baking dish with the 4 sprays of cooking spray to prevent sticking.

2-In a large bowl, mix 1 cup flour, 1/4 teaspoon salt, 1/2 teaspoon baking soda, 1/2 teaspoon cinnamon, and 1/2 cup packed brown sugar until well combined.

3-Add 1/2 cup margarine or butter to the dry mix and blend until it forms a crumbly texture, ensuring even distribution.

4-Fold in 1 cup uncooked oats and 4 medium apples, peeled and chopped, to incorporate the fruit evenly into the mixture.

5-Press the batter firmly into the prepared baking dish to create an even layer that bakes uniformly.

6-Bake for 30-35 minutes until the bars turn golden and a toothpick inserted in the center comes out clean.

7-Allow the bars to cool completely in the dish before cutting into squares for serving.