abstract annual-plant arugula background bitter brassicaceae colewort edible eruca eruca-sativa eruca-vesicaria flavor flavour food fresh garden-rocket health healthy herb lateral-lobes leaf-vegetable leafy-green-vegetable leaves nutrients nutrition nutritious peppery pinnate-leaves plant raw rocket roquette ruchtetta rucola rucoli rugula salad salad-green salad-vegetable tart vegetables vitamins wallpaper leaf Nyberg sativa tomato tomatoes vegetable onion onions