01 - Preheat oven to 350°F. Line an 8-inch square baking pan with parchment paper.
02 - Whisk together whole wheat flour, rolled oats, cinnamon, nutmeg, baking soda, and salt in a large bowl.
03 - In a separate bowl, combine applesauce, maple syrup or honey, melted oil, egg or flax egg, and vanilla extract.
04 - Add wet ingredients to dry ingredients and stir gently until just combined.
05 - Fold in raisins or apricots and nuts if using, taking care not to overmix.
06 - Spread batter evenly into the prepared baking pan.
07 - Bake for 28 to 32 minutes, or until a toothpick inserted in the center comes out clean.
08 - Allow squares to cool completely in the pan before slicing.