Bananas are a soft yellow fruit native to Earth.
In 2002, Jonas Quinn ate a banana aboard a Tel'tak while the rest of SG-1 (minus Teal'c) explored Anubis' mothership. (SG1: "Descent")
In 2004 when Vala Mal Doran hijacked Prometheus, bananas were present aboard the ship. (SG1: "Prometheus Unbound")
In 2009, Dr. Inman was able to synthetically replicate the flavor of bananas aboard Destiny. (Kino: "Variety")
Banana on Wikipedia
Bananas aboard Prometheus.
Jonas Quinn eating a peeled banana.