Asparagus and Green Pea Risotto with Fresh Herb Tarka

Name: Asparagus and Green Pea Risotto with Fresh Herb Tarka
Ingredients: 2 tablespoons unsalted butter; 2 tablespoons extra-virgin olive oil; 1 tablespoon finely chopped fresh basil; 1 teaspoon finely chopped fresh rosemary; 1 teaspoon finely chopped fresh thyme; 1/4 teaspoon freshly ground black pepper; 1/8 teaspoon red pepper flakes; 2 pounds asparagus; 1 Parmigiano-Reggiano rind (optional), plus 1 cup finely grated Parmigiano-Reggiano; 1 teaspoon coarsely ground pepper (optional), plus 1 teaspoon freshly ground black pepper; 6 tablespoons unsalted butter; 1 medium red onion, finely chopped; 2 cups Arborio rice; 1/2 cup dry white wine; One 10-ounce bag fresh or frozen green peas; Finely chopped fresh basil, for serving