Preheat oven to 350 degrees F. Line a 9x13 baking pan with parchment paper and set aside.
In a large bowl, combine oats, flour, baking soda and salt. Mix well.
Add the eggs, brown sugar, applesauce, butter, honey and vanilla. Use a wooden spoon to stir the mixture until combined. Fold in the apples.
Spread the mixture evenly inside the prepared pan, using a rubber spatula to press into the corners. Bake in the preheated oven for 23 minutes, or until crispy and golden brown around the edges.
Let sit in the pan for 10 minutes. Carefully lift the parchment onto a flat surface and cut into squares.