dunno if it's still around, but i used to love the cheesessteak from this one place by the spectrum
405 exit irvine center drive. go west. on your left hand side right before the 24hr there's a cheesesteak place. I loved it way better than philly's best (also in irvine)
Not sure if it's still there. Last time I went was 2 years ago and it was delicious.
Second these recs. Also like John Philly's Grill in Huntington Beach.
Philly's Famous is in Tustin and is pretty tasty, too.
2244 Fairview Rd, Costa Mesa, CA 92627
4250 Barranca Pkwy, Irvine, CA 92604
John's Philly Grille
16061 Goldenwest St, Huntington Beach, CA 92647
Philly's Famous Cheese Steaks
648 E 1st St, Tustin, CA 92780