Wash and mince the spinach. Set aside.
Crumble the goat cheese or dice into small cubes. Set aside.
Cut the bread into small cubes and put in a plate. Drizzle some olive oil and dust some oregano and salt. Put in the microwave for 1 minute, take out and stir, heat for 1 more minute or until the croutons are done. The time will depend on the power of your microwave oven.
Arrange a bed of spinach in a jar, add croutons, blackberries, some more spinach and goat cheese at the end. Add some olive oil, salt and lemon to taste, and a dash of rice vinegar.
Before serving, shake the jar to mix the ingredients and dressing.