3 pan roasted with mushrooms and for two Recipes

olive oil, divided, shiitake mushroom caps, thinly sliced, leek, white part only, thinly sliced and cleaned, fresh thyme, chopped (divided ), salt, divided, fresh ground black pepper, divided, boneless skinless chicken breast halves

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 )