Preheat the oven for 375°. Spray muffin pan with non stick baking spray or line muffin pan with cup cake paper.
In a medium to large size bowl, add Sugar & Butter and mix until both ingredients are creamed then add in the Vanilla, Egg and the mushed Bananas, mix all ingredients until combined.
In another bowl, Sift the Flour, Salt and the Baking Soda together.
Add the Flour mixture alternately to the creamed mixture.
Add in the oatmeal. and gently fold all ingredients with a silicone spatula. Being very careful not to over mix.
Using a 3/4 measuring cup, scoop out the batter to fill each muffin cup.
Bake in the oven for 18-20 minutes or do a toothpick check by sticking a toothpick in the center of the muffin and the toothpick should be clean with nothing on the toothpick.
Allow to Cool for about 30 minutes.