Bring to a boil, lower heat and simmer until tender, about 20 minutes.

Bring to a boil, lower the heat slightly, cover and cook until tender, about 25 minutes.

Bring to a boil and cook until tender, about 10 minutes.

"She brought the tea-tray into the library about ten minutes or so later."

Bring to a simmer, cover and cook over low heat until mussels open, about 5 minutes.

Bring to a boil, lower the heat and simmer until very tender, about 5 minutes.

Bring to a boil and cook over medium heat about 20 minutes, until the mixture is thick.

Cover with water, bring to a boil and cook until it is tender, about eight minutes.

Bring to a boil, and cook until softened, about 5 minutes.

Bring to a simmer and cook until tender, about 45 minutes.