Step by step
Put the base in the oven and cook for 10 minutes to firm up the base a little, add the elderflower extract to the jam and mix well. Take the base out of the oven and spread the jam over it
Tips
To make your own bitter orange marmalade, buy only Seville oranges, but remember that you can only get them in January and February.
Trivia
Elderflowers are used to make a perfect tea infusion to treat a cold and also have beneficial effects on the circulatory system.