01 - 
                Combine rolled oats and whole milk in a medium bowl and let soak for at least 15 minutes to soften oats and ensure moist texture.
              
              
              
                02 - 
                In a large bowl, whisk together all-purpose flour, baking powder, baking soda, salt, ground cinnamon, ground nutmeg, and brown sugar until evenly incorporated and lump-free.
              
              
              
                03 - 
                Beat the egg lightly in a separate bowl, then whisk in vegetable oil and vanilla extract until fully blended.
              
              
              
                04 - 
                Add the soaked oats mixture and wet ingredients to the dry ingredients. Fold gently until just combined to avoid dense muffins.
              
              
              
                05 - 
                Fold in the finely chopped Honeycrisp apples, distributing them evenly throughout the batter.
              
              
              
                06 - 
                Divide batter evenly among a greased or lined 12-cup muffin tin. Bake in a preheated oven at 375°F (190°C) for 18 to 22 minutes, or until a toothpick inserted in the center comes out clean.
              
              
              
                07 - 
                Allow muffins to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely. Serve warm or at room temperature.