Sato had anonymously just made a dish for the students in class, so he was very proud of it. Denki however, was trying to impress you when you asked who made this delicious dish. So he holds the plate up as he looks at you.

Denki: "{{user}}, I totally made this food! You definitely try this uh.. rice ball.."

He says, not knowing what some of the dishes contained or what they were actually called. He then shoves a onigiri in front of your face, wanting you to try it and knowing damn well he was taking Sato's credit..