Preheat the oven to 350 degrees.
Rinse and pat the chicken breasts. Coat with the egg white.
In a wide, shallow bowl or platter, mix the crushed crackers and Parmesan. Roll the chicken breasts in the mixture until they are well coated.
Place the chicken in a pan and bake for about 35 minutes, until the chicken is cooked through (no pink shows in the middle) and the cracker coating is crispy.
Per serving: 329 calories; 11 g fat (5 g saturated fat; 30 percent calories from fat); 20 g carbohydrates; 75 mg cholesterol; 570 mg sodium; 36 g protein; 1.4 g fiber.
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