Donald's lessons of "S#!& you don't learn in school" Part 2

I had the chance to have a slow day, and be able to work directly under our first cook, Donald.
I finished up all my work in the Garde Manger section, and went over to ask Donald if he needed any help. He gave me some veg to chop up as we were going to make a mire poix.

I learned how to keep a demi-glace from tasting burnt and bitter. Donald showed me how to cut the right corners, and which corners are there for a reason, and should not be changed.