The roast isn't as big as the one called for in the recipe. The thyme, sage and rosemary aren't fresh. The mustard is sorta like dijon. Onions are very much like shallots. I don't think the author had an oven that had convection bake...but I like convection bake. When it comes time to make the sauce...I don't have any vermouth...dry or otherwise.
I'm sure it'll be delicious.