Blend the cream cheese, cheddar cheese, onion, salsa, cumin, and jalapeño. If your cream cheese is at room temperature, you can mix this by hand (It takes a little more work) but can be done. Otherwise, blend with a mixer,
Scoop onto plastic wrap and mold into a pumpkin shape (see photo above).
Chill for at least 2 hours.
Using a small bowl that is large enough to fit the cheese ball, add the crushed nacho-flavored tortilla chips to the bottom of the bowl. Unwrap the cheese ball and roll it in the crushed chips. Press the bell pepper stem on top of the cheese ball.
Plate the cheese ball and serve it with your favorite tortilla chips or crackers.