It occured to me that I could combine my desire to learn how to make marmalade with the plethora of ruby red grapefruit in the farmers' market in my area ($2 for fifteen pounds!).
But does ruby red marmalade taste good? I could combine it with equal amounts of navel (also cheap and tasty), but I was wondering if the pith of a ruby red is just too thick to be any good in a marmalade period. I like marmalade's bitter edge, but haven't ever tried grapefruit.
Should I add lemons to the mix too, for a three citrus marmalade?