Escarole

Escarole appears like lettuce, though it is usually far more bitter. It’s the straight leaf version of endive. Typically used fresh or cooked.

Escarole has been associated with potential antimicrobial, antioxidant, anti-inflammatory, hepatoprotective, and antidiabetic effects.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10376668/