My Father liked liverwurst and onion sandwiches. He was the only one in our family of 7 who would even touch them.
Your Father is a man with very good taste.
Put the liverwurst and onions on rye or pumpernickel with horseradish mustard and Muenster cheese and you have bliss. The summer version of this is Beefsteak tomatoes with green onion, bacon, cheese and Miracle Whip on the freshest squishiest white bread you can find.
Liverwurst and Onion on a thick onion roll - yum! So darned good.
Are you one of my brothers? I think we had the same dad.
We used to make something like that, but called it head sausage. I didn't care for it much when I was young, but later really took a liking to it. I cannot find anyone who still makes the stuff.