I used very thin rolls and added a sliced red onion to each burger. Delicious!
Balsamic-Blue Cheese Portobello Burgers
AnnaMae Posted: 07/09/09
JillHP Posted: 06/04/10
Great twist! The mushrooms had tons of flavor after marinating and were tender and "meaty." I used feta, and it gave the burgers a creamy tang. My only complaint was that the balsamic mayo was a little bit too much, since there was vinegar in the marinade, too.