It's WorcesterSHIRE sauce!

Orange zest is a constituent of Elizabeth David's boeuf en daube, though she leaves the rind in strips. If you throw red wine into a stew or casserole, it's best to add it early, before the other liquid goes in, and get it to a merry bubble to give the alcohol time to evaporate with the lid off. Or just boil the wine in a small pan separately, set fire to it then pour it in. Burning the booze is good fun and it avoids a degree of harshness getting into the stew. If you have good stock you shouldn't need the Worcestershire sauce, though adding it does no harm, or the bitters. As for herbs, I might make a little bunch of thyme sprigs, parsley stems and a bay leaf, maybe a little sprig of sage, all tied together with string, that I can remove towards the end. I find I can overdo the bay and I'm always careful with rosemary, which can be a bit of a hooligan if too much is added. I've been known to add bacon pieces to a casserole, though I never put in mushrooms, which I think add nothing. However, the inclusion of soaking water from dried porcini is a great addition. Another Elizabeth David trick is to add a few bits of pork rind. She cuts hers into tiny pieces but I wouldn't want to encounter tiny pieces of soft pigskin in my food, so I leave mine in big pieces that I can fish out before serving up. I get the rind by trimming it off pork chops, which I won't buy if they have been trimmed up. They can freeze until you need them. They add a nice degree of richness. If I'm slow cooking, I leave the carrots, celery and onions in much bigger chunks that I otherwise would. That way they add nice texture.