Whisk together egg whites in a large bowl; add fish and toss to coat.

In another large bowl, combine cornmeal, flour, salt, and pepper.

Lift fish from egg white mixture and then, letting the excess drip off, dredge into the cornmeal mixture, patting to adhere.

In a large skillet, heat oil over medium-high.

Working in batches, cook fish 2-3 minutes per side until golden brown and opaque throughout; add more oil as needed.

Top mixed greens with your favorite dressing and serve on the side, along with grapes. (Serving size: 3 ounces fish, 1 cup greens, 1/2 cup grapes).