Short Rib Lasagna Rolls

Name: Short Rib Lasagna Rolls
Ingredients: 2 tablespoons olive oil; 2 1/2 pounds beef short ribs; 2 teaspoons kosher salt, plus extra for seasoning; 1 teaspoon freshly ground black pepper, plus extra for seasoning; 1 onion, roughly chopped; 4 cloves garlic, peeled and smashed; 2 (4-inch) sprigs fresh rosemary; 2 cups red wine, such as pinot noir; 2 cups beef broth; 3/4 cup milk; 1/2 cup heavy cream; 1 1/2 cups grated Pecorino Romano (6 ounces); 1 cup shredded mozzarella (4 ounces); 1 (10-ounce) packet frozen spinach, thawed, drained, and squeezed of excess liquid; 1/4 cup chopped fresh basil; 2 cloves garlic, minced; 1 teaspoon kosher salt, plus extra for seasoning; 1/2 teaspoon freshly ground black pepper, plus extra for seasoning; 12 lasagna noodles (about 10 ounces); Butter, for greasing baking dish; 1 (25-ounce) jar marinara sauce; 1/2 cup freshly grated Parmesan; Olive oil, for drizzling