In a large bowl, combine softened cream cheese, sharp cheddar cheese, and feta cheese.
Add in the green onion, garlic powder, herbs, and salt.
Optionally, fold in chopped nuts and dried fruits.
Form the mixture into a ball and wrap it in plastic wrap.
Refrigerate for at least 2 hours.
Once chilled, unwrap the cheese ball and roll it in additional chopped nuts or herbs if desired.
Serve with an assortment of crackers and veggies.