Turn on the Saute button on the Instant Pot, and add oil/ghee, green bell pepper, onion, garlic, and spices (chili powder, cumin, oregano, paprika, salt, and pepper). Saute for 3-4 minutes.
Add ground beef, and cook through until brown.
Turn off Saute function. Add broth or stock, diced tomatoes, black beans, and corn. Put lid on and close pressure value. Select the Manual button and select “=/-“ button to 20 minutes.
When Instant Pot beeps, open the pressure value and let it depressurize.
Open the lid and stir well. Scoop out using a ladle into a bowl. Garnish with avocados, cheese, sour cream, and green onions.