Chatting to a friend the other day who said she piles her veg peelings around the meat and then uses the combined juices as the base for her gravy. I usually use meat juices and combine with salted water off the veg. If needed, add some stock, garlic, seasoning, plain flour mixed in water for thickening and a splodge of cream. Others prefer to use gravy granules or bisto or buy ready-made. There's no 'right way'....just whatever works for you!
Just wondering how you make yours?