Christmas orange marmalade

Ingredients for 6 servings:

• 75 g kumquat(s) (approx. 7 pieces)
• 3 large pink grapefruits (approx. 370 g each)
• 3 large oranges (280 g each)
• 1 carambola (approx. 150 g)
• 1 vanilla pod(s)
• 2 cardamom pods
• 1 kg gelling sugar (1:1)

Instructions

Working time approx. 35 minutes; Total time approx. 35 minutes

Halve the kumquats, blanch in boiling water for 2 minutes, drain, and refresh in ice-cold water. Peel 2 grapefruits and 2 oranges each with a sharp knife, removing all the white pith. Cut the segments out of the membranes. Squeeze the juice from the membranes and set aside. Squeeze the remaining grapefruit and orange. The fruit pieces and juice together should yield 3/4 liter. Wash the star fruit, cut crosswise into approximately 1/2 cm thick slices. Split the vanilla pod lengthwise and scrape out the seeds with the back of a knife. Mix the prepared ingredients, cardamom, vanilla seeds, and gelling sugar in a tall saucepan. Bring to a boil briefly while stirring, then simmer for 4 minutes. While still hot, fill carefully prepared jars and seal tightly.