Just a hint I picked up on a YouTube video of someone making similar 'square' rolls. Instead of letting the dough rise in a big measuring cup or bowl, etc., this restaurant cook put the dough in a square plastic container (I think he used old square ice-cream tubs). When the dough had risen, he turned it out and it was already square. It deflated instantly when he turned it out, and he gave it a few rolls with a rolling pin (working from the middle outward) and in seconds he had a perfect square of dough the size he wanted for his rolls. They didn't turn out looking machine-made, but they were of more or less uniform size and shape. Seemed like a cool trick to me, because I never seem to be able to get a square dough (like for cinnamon rolls) square when I try to roll it square starting from a circle.

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