I wondered this too when I first started experimenting with this recipe. The answer is to just space them out fairly evenly, leaving as much space between each roll as is possible. If using a round dish, see my photo above of the dish of uncooked rolls. I have 8 of the rolls around the edge, and 2 in the middle. They're touching, but that's OK. They'll expand while baking to fill up all the space in the dish anyway, which is fine.