Oil a 1-pound baking tin. Fill a Dutch oven or stock pot with about 5 inches of water. Bring water to the boil.
In a large bowl combine the flour, arrowroot, baking soda and ginger, stir in the currants. In a blender grind the nuts to a fine powder, add the juice or water and blend for 20 seconds.
If the ingredients in the blender dont reach the one cup mark, add a little more liquid. With the blender running low add the honey or molasses and lemon juice or vitamin C crystals. Pour the liquid mixture into the flour bowl, stir quickly to blend, do not overmix. Transfer to the prepared mould or can.
Cover with a square of foil or wax parer; tie the wax paper securely with a piece of string. Place the mould in the boiling water, cover the pot tightly and steam for 2 hours over a medium low heat.
Don't remove cover during this time. Remove the mould from pot and cool for 15 minutes.
