Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to curdle milk [title] Gently warm the milk. [step] Pour the milk into a saucepan and place the saucepan on the stove. Gradually warm the milk up over medium heat until steam just begins to form.

Ending1: Pour in enough water to cover the milk completely. [substeps] Make sure that the milk is dry. Ending2: After about ten to twenty minutes, use a spoon to gently pass it over the surface of the milk. If it gets too hot, stop the heat and let it cool. Ending3: Turn the heat to medium-low and let the milk completely cover the milk. Let the milk stand for five to ten minutes before removing it. Ending4: [substeps] While the acid you will use in this method may curdle the milk on its own when used in large enough quantities, heat dramatically accelerates the process, making the milk curdle faster and more noticeably. This is especially important if you plan to separate the solid curds from the liquid whey, as you would do when making cheese.

Answer format: ending1/ending2/ending3/ending4