1. Preheat the oven to 375 °F.
 
2. Mix together the flour, oat flakes, sugar, baking powder, salt, and cardamom (if desired). Set aside.
 
3. In a large bowl, beat the egg with a fork. Add the bananas, milk, and mix with a wooden spoon until well combined.
 
4. Incorporate the dry ingredients, stirring just enough to moisten.
 
5. Gently add the strawberries to the mixture and the white chocolate.
 
6. Deposit the dough into greased molds and bake in the oven for 20 to 25 minutes.