1. 小/微/文火：中火 medium heat | 小/微/文火 gentle heat | 煎 pan-frying
2. 小火/微火/文火：中火:medium heat | 小火/微火/文火:gentle heat | 烹饪方法:cooking techniques
1. gentle heat
1. Steam the custard over gentle heat for 15 minutes, and serve hot.
2. Bring to a boil, then adjust the heat to a gentle simmer.
3. Reduce the heat to a gentle simmer and wait patiently for another 10 minutes.
4. Reduce the heat to a gentle simmer and wait patiently for 10 minutes.
5. Turn down the heat and allow the broth to cook at a gentle simmer for 30 minutes.
6. Stir and simmer over gentle heat until mixture starts to thicken and bubble.