Bring to a boil then lower heat to a simmer for 15 minutes or until potatoes are cooked through. (bonberi.com)
Cover pot and bring to a boil, then lower heat to simmer for about half an hour, stirring often, until sweet potatoes and fork tender but not mushy. (isachandra.com)
Bring to a boil, then lower heat to a simmer until liquid is reduced by half, about 5 - 10 minutes. (peanutbutterandfitness.com)