Preheat oven to 450°F. Set a rack in the middle. Pat the roast very dry.
Stir together olive oil, Dijon, rosemary, thyme, garlic, salt, pepper, onion powder, paprika, and red pepper flakes.
Rub the herb paste all over the roast, coating the top and sides well.
Place the roast fat-side up on a rack in a roasting pan.
Roast 15 minutes at 450°F to set the crust. Reduce oven to 325°F and continue roasting until 125–130°F inside, about 70–80 minutes.
Transfer to a board, tent loosely with foil, and rest 15–20 minutes.
For a quick jus, set the pan over medium heat. Add broth, scrape browned bits, and simmer 2–3 minutes.
Slice the roast against the grain and serve with the pan jus.