Anyone knows what manga?

I read this a few years back and it’s about this kid who has green hair(almost as if his hair is in the verge of blooming) and it sets in this culinary school where he’s the top student but can’t cook(?) or so his performance grade is zero but when he eats something he can analyze it down to the ingredients and even the calories(?). Basically the one shot was about this popular girl who was trying to get him to eat her sandwiches because when they were younger he was traumatized by her cooking I think twice