Properties. Courgettes are vegetables rich in vitamin A (as beta-carotene), B and C, and minerals such as potassium, calcium, iron and phosphorus. From a digestive point of view, courgettes are well tolerated because they contain little fibre.However, the riper the courgettes, the greater the amount of fibre.roperties. Courgettes are vegetables rich in vitamin A (as beta-carotene), B and C, and minerals such as potassium, calcium, iron and phosphorus. From a digestive point of view, courgettes are well tolerated because they contain little fibre.