Fennels au gratin, looked like vomit on a plate; I used to get them at school for lunch in my home country with a thick rubbery ham slice as a second course.
Mutton is way too strong for me and tough, had to try it because of my bf's mum; same with lamb liver, yuck, tasted bitter and metallic.
I am not a fan of liver but when I was little I would eat grilled pig liver or ox one and I didn't mind it.
I generally don't like eting cold meat leftovers, I find they leave a bad aftertaste in my mouth, don't know if it's only me.