When I try to cook with a roasting pan or a frying pan I get the option to create roast or stir fry respectively and I end up getting a empty roast or stir fry. However my character doesn't use the ingredient and no nutrition is added to the food. This doesn't happen with every food tough, I have only noticed it with fish fillet and one other meat (I can't remember which). Even if I add other vegetables first I still can't add the fillet.
This is somewhat annoying as I live next to a lake and rely on fish for food. I have several mods installed, but I had this problem before installing mods too.