Summer Vegetable Frittata

Name: Summer Vegetable Frittata
Ingredients: 6 large eggs; 6 large fresh basil leaves, chopped; 1 tablespoon chopped fresh parsley; 1/4 teaspoon salt; 1/4 teaspoon black pepper; 1 oz prosciutto, finely chopped; 1 tablespoon olive oil; 1 lb medium zucchini (about 3), halved lengthwise and cut crosswise into 1/4-inch-thick slices; 5 medium Swiss chard leaves, stems discarded and leaves finely chopped (1 1/2 cups); 12 scallions, trimmed and finely chopped; 5 zucchini blossoms*; 2 ozfinely grated Parmigiano-Reggiano (1 cup)