Wash the oranges in hot water, rub dry and tear off the peel into strips with a zest ripper. Peel the remaining orange peel so that the white skin is completely removed. Use a sharp knife to cut out the flesh between the parting skins.
Weigh 600 g of orange meat. Scald apricots with boiling water and blanch for about 2 minutes. Rinse the fruits cold and peel the skin. Halve and stone the apricots. Weigh 400 g apricot flesh.
Mix Gelfix with 2 tablespoons of sugar and stir well with orange meat, orange peel strips and apricots in a large pot. Bring everything to the boil while stirring over high heat. As soon as the fruits are bubbling, stir in the remaining sugar.
Bring the whole thing to the boil again, let it boil for at least 3 minutes while stirring constantly. Add the liqueur. Pour the jam into hot rinsed twist-off jars, close them and leave them on the lid for about 5 minutes.