I cook about two pounds of some type of meat every morning and just throw in the ounce of liver. I remove it rare and just eat the bite. I pan sear and sautÃ©e the meat with coconut oil and herbs and spices. One ounce of liver is a tiny bite and no matter how you cook it has a very strong flavor.
Chicken liver is slightly less nutritious but has much lower retinol so it is safe to eat about two onces per day for most men.
As far as oysters go they seem to be an acquired taste that people new to the fish either instantly love or have to force themself to get used to.
I like to have soup as one of my late day meals and boil the oysters for a few minutes with chicken broth or a cream soup along with whatever herb spices and vegetables I am in the mood for.
They are also delicious when mashed and made into a dressing with Italian bread crumbs onions garlic and butter. Very rich and full flavored. Oysters Rockefeller is a delicious recipe you can Google as well.
Of course if it is the right season(source dependent) and the quality of your source is high you can eat them raw as well. I like them with Tabasco and lemon and the acidic sauce reduces the risk of eating them raw.
Clams are nutritious but they have much lower levels of zinc, vitamin D, and magnesium. Oysters are definitely preferred as testosterone and recovery boosters.