In this recipe, I enjoy the mix of spices: serrano, cilantro, mint, cinnamon...
Next time we'll cook it, we won't have serrano available. What could be a substitute for it?
Ideally this substitute is not hard to get in Europe...
Note the serrano's contribution to the dish. They're not opened. They're not eaten. They simmer with the rest of the ingredients perhaps adding some taste.
EDIT: Thanks for the suggestions. I now realize that substitute may not have been the best wording. Given the constraints, a simple s/serrano/xxxx/ replacement may not do ☺