sentence: recently some initiatives have been started to encourage interest in such '' forgotten '' vegetables as common purslane , medlar , parsnip , and black salsify greenhouses are used to produce tomato , lettuce , cucumber , and sweet pepper fruits include apple , pear , cherries , berries , and plum the dutch keep cow both for milk and for their meat , chickens for their eggs and for meat , pig for their meat , and sheep for their wool and meat .