Chicken Parmigiana

Ingredients:
8 chicken breast cutlets, or 4 boneless skinless chicken breast halves, split horizontally into 8 cutlets (1 1/2 pounds total)
1/2 cup dried breadcrumbs
1/2 cup finely grated Parmesan cheese
Salt and freshly ground pepper
2 large eggs, lightly beaten
1/4 cup olive oil
2 cups spaghetti sauce, homemade or purchased
8 slices (1/4-inch-thick) mozzarella cheese, preferably fresh (6 ounces)