Quince is inedible raw and remarkable after fifty minutes, turning from bone-white to deep pink on its own with no help from anything. It keeps two months in a cold room, which is why it appears in a November plan and again in January.
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.