When I was young, this was my favorite dish. I would often beg my mom to make it.

For a different twist, try using a mixture of Dijon mustard and herbs for the crust, which will add a tangy flavor profile. You can also experiment with different herbs such as sage or parsley to create your own unique herb blend. If you prefer a spicier take, add a pinch of crushed red pepper flakes to the herb mixture. For a richer gravy, consider adding a splash of red wine or a tablespoon of balsamic vinegar to the onion mixture before adding the beef stock.