Grilled Steak With Blue Cheese Potatoes

INGREDIENTS

• 3 cloves garlic, coarsely chopped
• 3 tablespoons coarsely chopped fresh rosemary, plus sprigs for garnish
• 1/4 cup plus 2 tablespoons Worcestershire sauce
• 2 tablespoons extra-virgin olive oil, plus more for brushing
• Freshly ground pepper
• 1 3/4 pounds skirt steak
• 1 1/2 pounds small red potatoes
• Coarse salt
• 3 ounces blue cheese, crumbled