Why is my cooked beef liver getting creamier and spreading like butter as it gets closer to room temp?

Just cooked beef liver in a pan with olive oil and onion. First time even having liver.
Uhh... The guides online said to not overcook and cook it on med high heat for like 1-2 mins each side. I pretty much did that.
Now as it sits on my plate as i try to think of ways to gulp this nutritious food down without making a lemon face... I can't help. but wonder why the hell its spreading like butter. Its worse than mashed potatoes and thats not helping me gulp it down... Its kinda gross. Please any advice? I have a bunch of other grass fed beef livers in the freezer ready to go because i read research that it is loaded with vitamin A and i need that badly for my dry eye and vision issues.

Thank you!
Why is my cooked beef liver getting creamier and spreading like butter as it gets closer to room temp?
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