Preheat the oven to 350 degrees F. Spray 8-9 cavities with nonstick spray and fill the other ones halfway up with water (ensures even baking). Do not use muffin liners.
Beat together the applesauce, almond butter, honey, vanilla extract, and brown sugar in a large bowl. Beat in the egg.
Beat in the salt, baking soda, baking powder, and oat flour.
Beat just until combined. Stir in the old-fashioned oats.
Remove the peel and core of an apple and finely chop the apple into small pieces. Mix with the lemon juice and then add the apples to the mixture along with 2 tablespoons of chopped pecans.
Bake at 350 degrees for 16-18 minutes.
I use less sugar as told, depends on your taste