Wash tomatoes nicely in running water.
Plugin the Instant Pot, Switch on the saute mode.
When the display shows HOT , add oil followed by finely chopped ginger and garlic.
Once raw smell of garlic goes away or it starts turning light brown, add finely chopped onions.
Saute till light pink.
Add finely chopped tomatoes and red bell pepper.
Add herbs, black pepper powder, sweetener and salt.
Cancel the SAUTE Mode, put on the lid and then turn on the PRESSURE COOK MODE.
Set the TIMER for 5 minutes,
Once the timer goes OFF, do the Quick Pressure Release , open the lid and check.
If there is lot of liquid from tomatoes then Switch on SAUTE Mode again and cook for till you get chunky mix.
You can keep the sauce Chunky or blend it Smooth with Hand Blender or in blender.