Wash rhubarb and chop.
Put into saucepan with ½ cup orange juice (you can use water, but orange juice gives you extra flavour) and ½ cup of sugar. Stir through the sugar.
Bring to the boil, then turn heat down very low, cover with a lid, and simmer for about 15 minutes. Stir occasionally to ensure the rhubarb cooks evenly. If the liquid has boiled off too rapidly, you can add a little more orange juice, but bear in mind the rhubarb will release liquid too. You want some of the structure of the rhubarb to remain.
Before taking off the stove, taste. Do you prefer tangy, or sweet? If you want a little more sugar, stir through a bit at a time and adjust for your taste.
Serve as is, or on porridge, with rice pudding, custard, ice cream, cream.