Preheat oven to 375 degrees Fahrenheit and place 12 muffin liners in muffin pan. Set aside.
Blend oats in a blender until it’s a flour consistency.
In a medium bowl, mix oats, almond flour, baking soda, cinnamon, and salt together.
In a large bowl, mash bananas.
Add the eggs, yogurt, coconut oil, and apple cider vinegar to the bananas and mix well.
Pour banana mixture into the bowl with the dry ingredients and stir to combine, careful not to overmix.
Mix in blueberries and nectarines.
Scoop muffin batter into muffin liners so that they are filled to the brim.
Cook for 18-20 minutes or until a toothpick comes out clean when inserted into the middle of a muffin.