Having accomplished his dream of serving the eggs of eight different birds at one brunch, Haute Barnyard enfant terrible Colin Alevras of the Tasting Room is now contemplating his own high-end burger. But only if it “isn’t just another burger or some kind of over-the-top tarted up silliness. It had to have integrity.” Fair enough. So what did Alevras come up with? “I’m still working on it,” the chef tells us, “but we won’t be using pork fat like some people do, because then it’s just a sausage.” (Take that, Ryan Skeen!). “I want to put neck meat in there and tongue and heart and a little bit of calves’ liver for flavor. And why use fat, which just melts away anyway? I’m going to use marrow for fat, which will stay intact and also have a beefier, deeper taste.” Alevras is ensconced in bun and cheese issues, but the burger will debut for brunch service on March 30. Its name? The Old McDonald Burger. How’s that for Haute Barnyard?