Healthier Chicken Parmesan

Name: Healthier Chicken Parmesan
Ingredients: 3 ounces baked whole-grain wheat crackers, such as Triscuits (about 12); ⅓ cup fresh flat-leaf parsley; ½ teaspoon dried oregano; Coarse salt and freshly ground pepper; 1 can (28 ounces) diced tomatoes (no salt added), with juice; ½ medium onion (3 ounces), coarsely chopped; 2 garlic cloves, coarsely chopped (2 teaspoons); 1 tablespoon extra-virgin olive oil; 2 large egg whites; 6 boneless, skinless chicken breast halves (6 ounces each); 3 ounces part-skim mozzarella cheese, grated (about 1 cup); 1 ounce pecorino Romano cheese, finely grated (about ½ cup)