Preheat oven:
Heat the oven to 350°F (175°C).Puree and whisk:
Puree one banana, then whisk it with the egg, yogurt, and coconut oil.Add vanilla and baking powder:
Stir in the vanilla and baking powder.Fold oats and banana:
Fold in the oats. Dice 1/2 banana into pieces and mix them in. Optionally, let the batter rest for 5 minutes.Fill muffin cups:
Divide the batter among silicone muffin cups. Optionally, top each with a banana slice.Bake until golden:
Bake for 20-30 minutes, checking periodically. The muffins are ready when golden brown and a toothpick inserted into the center comes out clean.Cool before serving:
Allow to cool before serving.