Sesame Crusted Seared Tuna

Season your sushi grade tuna steaks with salt, pepper, and lime zest. In a separate bowl, whip two egg whites until they form stiff peaks. Brush the seasoned tuna steaks with the whipped egg white, then coat them thoroughly in sesame seeds. Heat a pan until very hot. Quickly sear the tuna steaks in the hot pan until a crunchy outside develops. Slice and serve immediately, optionally over a veggie slaw with peanut dressing.