What commonality does shaped food and shaped poems share?

I should add, besides shape.
Shaped food and shaped poems share the element of surprise.

Try this experiment. Take a rice salad (forbidden rice, asparagus, cherry tomatoes, herb of your choice, olive oil, pepper, nuts of your choice, avocado cubed). Fill a small rammaken with rice salad. Invert. Top with cut manilla mango. Heavenly taste. Heavenly shape.