Season roast with salt and pepper; place in shallow pan and roast for 20 minutes. Meanwhile, place croutons in plastic bag, roll with rolling pin until crushed.
Remove roast from oven; spread surface with mustard and sprinkle with crouton crumbs.
Return to oven and continue to roast for 15-20 minutes longer, until internal temperature on a thermometer reads 145 degrees F. Remove roast from oven; let rest about 10 minutes.
Serving Suggestions: