- Step 1: Brown the Ground Beef: Turn the Instant Pot to the "Saute" function. Add the ground beef and cook until browned, breaking it up with a spoon. Drain off any excess grease. 
- Step 2: Saute Aromatics: Add the chopped onion and minced garlic to the Instant Pot. Cook until the onion is softened and translucent, about 3-5 minutes. 
- Step 3: Add Remaining Ingredients: Stir in the crushed tomatoes, tomato sauce, kidney beans, green bell pepper, chili powder, cumin, oregano, cayenne pepper (if using), and beef broth. Season with salt and pepper to taste. 
- Step 4: Pressure Cook: Close the Instant Pot lid and seal the valve. Cook on "Manual" or "Pressure Cook" mode for 15 minutes. 
- Step 5: Natural Pressure Release: Allow the Instant Pot to naturally release pressure for 10 minutes, then manually release any remaining pressure. 
- Step 6: Serve and Garnish: Open the Instant Pot and stir the chili. Serve hot, garnished with shredded cheese, sour cream, and chopped green onions, if desired.
Optional: For a thicker chili, mix 1 tablespoon of cornstarch with 2 tablespoons of cold water. Stir the slurry into the chili after cooking and let it sit for a few minutes to thicken. Other variations include adding a can of diced tomatoes or substituting ground turkey for ground beef.