Preheat oven to 350°F. Line a cookie sheet with parchment paper; set aside.
In a large bowl combine dry ingredients oats through salt. Stir until evenly combined.
In another bowl combine mashed bananas, egg, peanut butter, oil and vanilla. Whisk until smooth.
Pour wet ingredients into dry ingredients and mix until just combined.
Gently fold in walnuts, chocolate chips, and raisins.
Using about 1/2 tbs of dough, roll into a ball, place on prepared cookie sheet, and then flatten slightly with the palm of your hand. Repeat with remaining dough leaving at least 1/2" space between cookies.
Bake for 11-14 minutes or until bottoms and edges are turning golden.
Let cool completely before serving. Enjoy!