Ciabatta bake for Christmas

Hello,

I had the urge to bake a little Ciabatta for Christmas so here are the results.  First batch in years so it needs some improvement.

Method:

62%hydration Biga

2.1%salt

80%water

1/2tsp inst. yeast

Flour KA 200g

biga 600g

Mix with hook until window pane fold once after 1hour, proof until double, bake 420 for30-35min