First off, peel and chop the onion and the ginger.
Then, rinse and chop the plums, discarding the pit. The smaller the plums are chopped, the less chunky this chutney will be.
Add the oil to a small pan or small pot and set it on a stovetop set to medium heat.
Add the chopped onion and ginger to it and let these saute for about 5 minutes, stirring often so they do not burn.
Then, add in the plums, red wine vinegar, sweetener, ground cayenne, smoked paprika, cumin, cinnamon powder, turmeric powder, and cloves to the pan.
Cover the pan with a lid and let this mixture simmer for about 15 minutes.
Remove the lid, turn the heat to medium-high heat and let this simmer for a minute longer, stirring well so the liquid thickens. Then, remove the pan from the stovetop.
If you prefer a less chunky chutney, use an immersion blender to blend up this chutney. Or, add it to a blender and pulse a few times.
Then, season this chutney with salt and black pepper to taste and stir well.
Place spoonfuls of this chutney in jars and seal them well.
This chutney can be eaten when it is made or stored and enjoyed later.