A Part of Veal

Yesterday I went to a French restaurant in Paris for lunch. When I surveyed the menu quickly, I saw “Rognon de veau” on it which looked interesting.
I asked the waiter what it was. He replied with confidence, “It is a part of veal and it is very good. You should try it.” Then I ordered it.
When it arrived, it looked like beef stew. I was so excited and had a bite. It tasted and smelled funny. I goggled it and found out in shock that it was actually Veal KIDNEY :s

I could not finish it (I did make an effort to eat more). I brushed my teeth twice immediately and swallowed many mint drops :s