Queijo de Azeitão is a cylinder of semisoft cheese made with sheep's milk, similar to Serra or mountain cheese. It has a mild, creamy paste and a yellow rind. This cheese is at its best in winter and spring and contains 45% fat. It is made with vegetable rennet, curdled with thistle, so is suitable for vegetarian. It may be found weighing 200-250 g (7-9 oz). The top is removed and the cheese is served with a spoon but hardens as it ages. Affinage is usually 3-4 weeks. (PDO). Golden when fresh, this cheese has a sharp, tangy taste.