Crispy Chicken Tenders with Piccata Sauce

Name: Crispy Chicken Tenders with Piccata Sauce
Ingredients: 3/4 cup panko (Japanese breadcrumbs); 1/2 packed cup fresh spinach leaves; 1/2 cup grated Parmesan; Zest of 1 large lemon; 3/4 teaspoon kosher salt; 1/4 teaspoon freshly ground black pepper; 3/4 cup buttermilk; 1 pound chicken tenders, patted dry with paper towels and cut into 2-inch pieces; 3/4 cup safflower or vegetable oil; 1 cup low-sodium chicken broth; 2 tablespoons fresh lemon juice (from 1/2 large lemon); 1 tablespoon all-purpose flour; 1 tablespoon unsalted butter, at room temperature; 2 tablespoons finely chopped fresh parsley leaves; 2 teaspoons agave; 1/2 teaspoon kosher salt