Select saute or browning setting on a 6-qt. electric pressure cooker; adjust for medium heat. Cook half the beef until no longer pink, 7-9 minutes, breaking it into crumbles. Remove meat and drain liquid from pressure cooker. Repeat with remaining ground beef. Press cancel. Return all to pan. Stir in the remaining ingredients, except the optional ones. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 40 minutes. Quick-release pressure. Stir before serving. If desired, serve with cheese and sliced jalapeno.