Place diced onions, apples, fresh cranberries, dried cranberries, grated ginger, orange zest and sea salt in preserving pan and stir.
Make your spice bag by tying up the spices in a large muslin square or use a ready made bag. Add to the pan.
Pour in orange juice and red wine vinegar and stir well. Slowly bring to the boil.
Cover with a lid and simmer for 30 minutes.
Take off the lid and remove pan from the heat. Stir in the sugar.
Place the pan, without lid, over a low heat. Let the chutney mixture simmer for at least 1 1/2 to 2 hours. Stir every now and then to prevent sticking to the bottom of the pan.
The chutney is ready when the liquid has reduced and is thick and glossy. Check for thickness by drawing a silicone spatula or wooden spoon through the chutney mixture. Your chutney is ready when it parts to reveal the base of the preserving pan for a few seconds.
Remove the spice bag before potting.
Ladle into sterilised jars and label when cold.