to make the starling puree you just get a chicken on any of the "SGT" class floors. to do this you go through the center door on the "SGT" class floor of you choice(floors 20 something to 30 something) and you should see a load of boxslike a storage unit. There is a lever on top of it, and if you click the lever a chicken will fly out. you put the chicken in one of those boxs and a purple sauce will come out, whilst it is comin out you just ave to put the beer glass you got ,from the robot in the bar, under the pouring purple substance. you then just ave to take the beer glass back up to the robot.
P.S. you may have ave trouble with the chicken comin out. If you do just go to the fuse box and put yellow switch up and remove the yellow fuse.