Turn on the saute function to the middle setting, "normal" on my duo60. Saute the onion in about a tablespoon of water or stock covered for about 5 minutes until it begins to soften.
Add the bell pepper and garlic, cover, and saute a couple more minutes.
Add in the ginger, spices, sweet potato, tomatoes, stock, and kidney beans. Stir together. Turn of saute function, place and seal lid, make sure vent is set to "sealing". Set cooker to 8 minutes on high pressure. When cycle is finished, let pressure release naturally.
When pressure indicator drops, remove the lid. In a measuring cup or small bowl, combine peanut butter with 1/3-1/2 cup of liquid from the pot. Stir until combined and then add back into the pot.
Taste for seasoning. Add salt to the pot or serving if needed. Top with a sprinkling of the chopped peanuts.