Slake the starch in cold water and pour it into the pan in a thin stream while stirring; dropped in dry it seizes into lumps that never dissolve. Take it off the heat the moment it thickens — boiled starch thins again and will not recover.
It did not make it into the plan for these seven days.
The method above is what decides the dish, not a step-by-step recipe. The link runs a web search on the name: this page has no vetted sources of its own, and will not invent any.