Roast Halibut in Red Bell Pepper Broth (Bacalao en Caldo de Pimientos Asados)

Originally, this dish called for cod, which sounds just as delicious, but I happened to have some halibut. So that's what I used. I made a few changes from the source material -- I used half cilantro/half parsley (recommended!) and I added a little garlic to the herb mix as well. I also used about …