I never thought to mix it in with ground beef, that's so simple and I bet I wouldn't even notice it in there. I'm reading The Perfect Health Diet right now and with all the supplements I should be getting I just can't get liver out of my head. I know I'm low on some of the things that liver offer; but I don't do well on supplements, most of them make me puke or give me horrid headaches. And the only seafood I'll eat is very, very, very mild fish. I tried to eat shellfish once and I couldn't stomach it. I'm really a wuss when it comes to weird textures.
I actually ran across a thread where someone mentioned cutting it into little pieces then freezing it and swallowing it like you would a pill. Is it safe to eat raw/frozen liver? I might actually try that if I can't stomach it mixed into ground beef.