1.   Add the liquid, and adjust the heat so that the mixture simmers gently.

2.   Adjust heat so mixture simmers steadily.

3.   Bring to a boil over high heat, then adjust heat so mixture simmers gently.

4.   Bring to a boil, cover and adjust heat so that the mixture simmers steadily.

5.   Bring to boil, then adjust the heat so the mixture simmers gently.

6.   Bring to a boil, then turn heat down so mixture simmers.

7.   Let the mixture simmer a few minutes to reduce.

8.   Let mixture simmer until it thickens, stirring often to prevent sticking.

9.   Lower the heat so the mixture simmers steadily.

10.   Place over low heat and cook, whisking constantly, until the mixture just simmers and has thickened.