OK..That cow gave its life for you. Don't waste ANYTHING. Get all the organs you can. Liver is wonderful. Coat it in flour, fry it and make a onion gravy out of the pan drippings. Tongue is one of the most flavorful meats on a bovine there is. It tastes like really tender pot roast. Tacos de lingua are to die for.
Kidneys you cook outside and give them to the dog.
Brains, well, they're an acquired taste. Cook them with scrambled eggs.
The tail made into soup or braised for a few hours is a taste of heaven. Have the stomach(s) cleaned and scalded and make some menudo with the hooves too..
The heart needs to cook for a few hours because it can be tough. Bit, once it's tender and you have it in gravy on top of smashed taters.. Oh my goodness.
Sweetbreads (thalamus glands) are succulant and tender. Fry thim up like rocky mountain oysters. But, if this was a cow, you probably don't have the oysters..
Don't forget head cheese
I think the only parts of that animal that I wouldn't eat are the intestines, kidneys, and the lungs.. Some of the parts I mentioned, I would rather eat than prime rib. You might not get the brains though since mad cow disease scared everyone. I don't think they are legal to sell or to even give back to the owner of the animal. If you have dogs, they would love the lungs, kidneys, "cleaned" intestines all ground up and cooked for them.
Oh, and the leg bones MUST be cut about 4" long, roasted and the marrow served with bruschetta. That IS heaven!