Rhubarb and Orange Jam: Modern Recipe

Using a vegetable peeler, remove the rind from 3 of the oranges and reserve. Using a serrated-edge knife and cutting with sawing motion, remove both rind and pith from the remaining 3 oranges and discard.

Heat the oven to No ½/250°F/120°C. Cut the reserved rind into thin slices and slice the orange flesh. Put them in a preserving pan with the rhubarb a