Rinse the sardines, make sure all the scales are gone. Place them on a bed of fresh parsley on the bottom of a large steam basket. Steam the sardines for 8 to 10 minutes until cooked through. Let them cool down after that.
In the meantime combine the red wine vinegar, ¾ cup (180 ml) of water, the cloves, a tiny pinch of garlic powder, the black peppercorns, half of the sliced tangerine, the lemon juice and a pinch of salt in a medium saucepan.
Place the sardines in a small baking dish and pour the vinegar mixture on top of them. Top with the rest of the sliced fresh tangerine and extra parsley.