Place 450 ml of white wine vinegar, 1 teaspoon ground ginger, 1 teaspoon yellow mustard seeds, ½ teaspoon cayenne pepper, ½ teaspoon mixed spice (if using) and 4 crushed garlic cloves into a preserving pan or similar large pan.
Add the finely diced green tomatoes, onions and cooking apples to the mixture as you prepare them. They should all be cut in similar sized small dice.
Bring pan to a gentle simmer and cook until everything is tender (took me 14 minutes).
Add the light brown soft sugar over a low heat and stir until dissolved.
Then stir in the finely chopped dried figs, ¼ teaspoon freshly ground black pepper and 3 teaspoons sea salt flakes.
Simmer (stirring occasionally) until mixture thickens to a jam like consistency and a wooden spoon dragged across the base of the pan makes a clean track (with no vinegar filling up the void). Don’t over-cook! (This step took me 1 ½ hours).
Pot up the hot chutney into hot sterilized jars using a large spoon and jam funnel if you have one. Pat the chutney down with the back of the spoon to eradicate any air pockets and screw lids on immediately.
Allow to cool, then store in a cool, dark place.
Can be eaten immediately or left a few weeks for flavours to develop further.