In a large pan or skillet, cook ground beef and onions on a medium heat until the meat is no longer pink.
Once cooked, drain grease and set aside.
Line or grease large slow cooker.
In a large slow cooker, add cheese, Fire Roasted Salsa, cooked meat and cooked onions. Heat while covered for 3-4 hours on a low heat and stir cheese dip periodically.