Chutneys have a tendency to be sugar and carb-laden - Onion chutneys even more so! By using sweetener instead of sugar you can drastically reduce the carbs in this particular condiment. It goes great with sausage rolls of any sort and would be perfect as the base of our French-style pizza.
This is accentuated by adding a couple of spoons of erythritol sweetener and a similar amount of cider vinegar, to give you a sweet and sour flavour to the chutney. Finish with a good amount of salt and pepper.
I would advise against it because the sugar in this could cause the chutney to stick to the bottom and give you a burn message. You can, of course, use the slow cook function of your instant pot. In that case, remember that LOW = Keep warm, Medium= cook on low heat, and HIGH = cook on high heat.