3 rosemary roast two pan Recipes

well-trimmed 8- to 9-lb rib roast (with 4 bones ), crushed dried rosemary, divided, coarse kosher salt, freshly ground black pepper, olive oil, boiling water, dried porcini mushrooms, butter, room temperature, divided, fresh button mushrooms , cut into 1/4-inch-thick slices, garlic cloves, minced, all purpose flour, low-salt beef broth, dry red wine, fresh rosemary (for garnish )

well-trimmed 8- to 9-lb rib roast (with 4 bones ), crushed dried rosemary, divided, coarse kosher salt, fresh ground black pepper, olive oil, boiling water, dried porcini mushrooms, butter, room temperature, divided, fresh button mushrooms , cut into 1/4-inch-thick slices, garlic cloves, minced, all-purpose flour, low sodium beef broth, dry red wine, fresh rosemary (for garnish )