Marmelada, if you've never had it, is nothing like marmalade. It is made of quince, not oranges, and although it is a kind of fruit preserve, it is much more firm than the citrus stuff. It's so hard that the Portuguese eat it in slices, alongside a piece of banana maybe or plain or with a hunk of cheese.
On the Local Food Report this week, Elspeth talks with Louiza Azancot of Chatham about the Portuguese tradition of preserving quince. You can find more details, and Louiza's recipe for Marmelada, here at Elspeth's blog.