Using sauté setting - add ground beef and onions to pot. Season with salt and pepper and cook until beef is thoroughly browned - mixing frequently. Pour into fine mesh strainer to drain and return to pot.
Add all remaining ingredients and mix well. Switch to manual setting for 5 minutes and close lid. Once cook time is complete - quick-release pressure.
Serve topped with sour cream, jalapeños, chopped avocados, and shredded cheddar cheese. And, of course, some tortilla chips on the side for dipping!
Serve with tortilla chips, shredded cheddar cheese, sour cream, and jalapeños.