Make the recipe 10% or 20% more. It fit a 8x8 but not well.

Try AP flour instead of bread. It was good, but I’m just curious.

Try the whole egg in the dough instead of just yolk. I don’t know much about why sometimes yolk alone or not.

Crumble topping maybe. The cream cheese is good, but I like crumble stuff better usually.

Cut back on the lemon. It’s really strong. I didn’t measure it well, just put a dash in, but it was a lot. The blueberry was second place and I’d like to taste it more.

Yes. Blend them into a puree, use same amount as blueberries. Probably blanch the skins off.