Place strawberries and bananas on a cooking sheet lined with parchment paper. Bake for 20 minutes.
Combine walnuts with coconut oil. Add coconut sugar, cinnamon, cardamom and nutmeg. Mix well and place on a cooking sheet lined with parchment paper. Bake for 15 minutes, or until nuts are toasted.
To assemble yogurt bowls, add 1 cup yogurt to each bowl. Top each with half slice of banana and half of strawberries. Add walnuts and dark chocolate.