How To Keep Bagged Lettuce Fresh Tiess says that lettuce with firmer leaves like escarole or curly endive, radicchio, as well as long-stemmed lettuces like Belgian endive and Asian celtuce ...

"But there is absolutely no reason not to grill or cook your lettuce. Heartier varieties, like romaine, escarole and endive, stand up just fine to a little heat." This might just be a sign to ...