If baking in the oven – you will need to bake for about one hour until the pepper is tender, but not mushy. If cooking in the Instant Pot or other electric pressure cookers – you need to cook for 7 minutes on High Pressure followed by 5 minutes Natural Pressure Release. Follow the recipe notes below for detailed steps. If cooking in the slow cooker – cover and cook on LOW for 6 to 7 hours or on HIGH for 3 to 4 hours.