He's lucky Roland's already weak for Inigo that he'd play along, like a classmate asking him for notes when the teacher isn't looking. Roland smiles knowingly, following Senku's instructions to the tee.

"Here we go."

Every things that's been mentioned is measured with frightening accuracy. He even holds some of the measuring cups to eye level, teaching Inigo that this would be the best way to see if your ingredients were exactly as they needed to be in quantity. Then, it's mixed dutifully, if not slowly, so Inigo can mimic him. Don't worry, dad's here!

Meanwhile -

"So, Senku. What's your favorite thing to eat? You're always around the kitchen these days. Ramen aside, I mean. Heh."