Question: how gruyere cheese is made?
Answer: To make Gruyère, raw milk is heated to 34 °C (93 °F) in a copper vat, and then curdled by the addition of liquid rennet. The curd is cut up into pea sized pieces and stirred, releasing whey. The curd is cooked at 43 °C (109 °F), and raised quickly to 54 °C (129 °F).