I want to make a seared, sesame seed encrusted piece of tuna, but every time I've tried this, I can't get the seeds to stick. Is there a trick to this? Some of the seeds do stick and get embedded in the tuna, but most of the time a lot of it falls off, especially if i grasp the piece with tongs to turn it. What I have been doing is just rolling the piece of tuna in seeds and then searing quickly for a few seconds on each side so I can keep it rare inside. Should I try brushing with egg white or something like that to make the seeds adhere better?