avocado dish food fruit prawns sauce sea food fruits green greens healthy organic produce vegetables alligator pear avocado pear black butter pear climacteric fruit cultivar egg-shaped fertility fruit firm guacamole Hass variety large berry large seed nutritious ovate pebbled skin perennials persea americana ripe rough soft tree wrinkled alligator-pear avocado-pear butter-pear climacteric-fruit large-berry large-seed pebbled-skin persea-americana kernel seed green-skinned hard unripened cut fertility-fruit flesh Fuerte-variety pear-shaped section smooth