This recipe livens up hearty vegetables with red curry paste—a concentrated combination of hot chiles and aromatics like lemongrass and galangal, a ginger relative. We're enhancing those flavors with some unique citrus elements. A fresh makrut lime leaf infuses the curry with lightly floral notes (you’ll remove the leaf after cooking), while charred lime, or lime cooked in a pan to caramelize its cut surface, adds a hit of complex acidity when squeezed over the vegetables and crispy catfish.