no, salsa and tomato sauce ARE NOT interchangeable. I couldn't eat the burger, I was so disgusted. I did not send it back a second time though, as I was talking to someone acquainted with Everett and I didn't want them to think "Everett's granddaughter is a real bitch isn't she." So i just ignored the burger and had a pleasant conversation. The guy called me shorey during the rest of the time. That was cute.