3 roast beef vegetable peppercorn salad Recipes

sweet potatoes , scrubbed and cut into 1-inch pieces, parsnips, peeled and cut into 3/4-inch pieces, celery root, peeled and cut into 3/4-inch pieces, golden beets, peeled and cut into 3/4-inch pieces, unpeeled garlic cloves, extra-virgin olive oil, salt, eye of round beef roast , trimmed of visible fat, freshly ground black pepper, balsamic vinegar, brined green peppercorns, chopped , plus 1 tbsp of brine, honey, baby arugula (about 3 oz)

whole black peppercorns, cumin seeds, coriander seeds, dried hot red pepper flakes, kosher salt, center-cut beef tenderloin roast (fillet of beef), trimmed and, if necessary, tied, vegetable oil, extra-virgin olive oil, fresh lemon juice, minced shallot, salt, mizuna or baby arugula, trimmed