Sift the flour.
Add oatmeal to the flour.
Mash the banana into a soft, homogeneous mass.
Add melted butter and sugar to the banana.
Pour milk into the bananas and butter.
Add eggs.
Mix with a blender until smooth.
Add sifted flour and oatmeal.
Mix the dough until smooth.
Cut the strawberries into small random pieces.
Add strawberries to the batter.
Divide the dough into the molds.
Bake the muffins in a preheated oven for 15-20 minutes.
Dust the muffins with powdered sugar and garnish with thinly sliced strawberries.