Pork Loin Stuffed with Pesto and Prosciutto

Name: Pork Loin Stuffed with Pesto and Prosciutto
Ingredients: 1 cup fresh basil leaves; 1/2 cup fresh tarragon leaves; 1/2 cup fresh dill leaves; 1/2 cup chopped fresh chives; 3 scallions, trimmed, white and green parts chopped; 1 tablespoon fresh thyme leaves; 1 tablespoon grated fresh horseradish or 2 teaspoons prepared horseradish; 1 garlic clove, chopped; Zest of 1 lemon; 1/4 cup extra-virgin olive oil; 1 (3-pound) pork loin roast; 2 1/2 teaspoons kosher salt, divided; 6 slices prosciutto; 1/2 cup grated Parmesan cheese; 2 teaspoons ground black pepper; 2 tablespoons olive oil