Panang curry is one of my favorite types of Thai curries. It is deeply flavored with spicy chili paste, hints of lime, and a nutty richness from the peanut butter. It is best to find a good quality panang curry paste for this recipe. Look for one at your local food co-op or health food store. Panang curry paste is typically made from Thai red chilies, shallots, lemongrass, garlic, coriander, galangal (Thai ginger), kaffir lime peel, cumin, and sea salt.