All over Shetland, Jam makers are 'oxter' deep in rhubarb in May. Pull the rhubarb stalks from the plant and then wipe clean with a damp cloth. Try to use the more tender stems that are pink at the root end as this will enhance the colour of the finished jam. I make a lot of this jam, some with or without ginger or orange. I give it as presents or use it as barter as I did recently for some delicious crabs.
I use a mixture of powdered ginger and pieces of crystallised stem ginger - grated root ginger will make the jam a bit more fiery.
Orange is a lovely addition to this jam and can be used with or without the ginger. Grated orange rind looks pretty and gives a more subtle flavour but if you prefer a full citrus blast then finely cut the peel of half a small orange, as if you were making marmalade, simmer in a pan with 5 cm water for half an hour, drain and add to the rhubarb for the last 10 minutes of boiling.
There is no water at all in this recipe as a considerable amount will come out of the rhubarb as it stands.