Lemon Garlic Shrimp Vegetables

Name: Lemon-Garlic Shrimp & Vegetables
Ingredients: 4 teaspoons extra-virgin olive oil, divided; 2 large red bell peppers, diced; 2 pounds fresh asparagus, trimmed and cut into 1-inch lengths; 2 teaspoons freshly grated lemon zest; 1/2 teaspoon salt, divided; 5 cloves garlic, minced; 1 pound raw shrimp (26-30 per pound), peeled and deveined; 1 cup reduced sodium chicken broth; 1 teaspoon cornstarch; 2 tablespoons lemon juice; 2 tablespoons chopped fresh parsley