The flat pod can be harvested early as a sweet and raw eating pea (although they are often used in cooking). They can also grow for longer, so that they swell into round pods for its peas to be used. When the peas dry they turn orange in colour, and the 'marrowfats' are usually used in soups.
The purple colour is caused by the pods' anthocyanin (an antioxidant) content.
The peas can be left to dry in the sunlight, or removed from the pods and kept at room temperature. They will turn into pulses suitable for storage, which can be soaked and boiled. When this particular variety dries, it is called a 'marrowfat' and has an irregular shape and larger size than most other peas.
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