Sunflower seeded Tartine polenta bread

I was pretty happy with my first attempt at a polenta sourdough (http://www.thefreshloaf.com/node/38701/polenta-sourdough). The hydration in that first loaf was 70% without taking into account the water in the polenta porridge. But I wanted a loaf with higher hydration, a more open crumb and more polenta. I decided to go with the tried and true Tartine basic country bread.

"Tartine Bread" has a recipe for a polenta bread from which I took inspiration. But I left out the corn oil and herbs and used lightly toasted sunflower seeds instead of pepitas (pumpkin seeds). I cooked my polenta into porridge instead of doing a soaker.

So here's my polenta sourdough version 2.0 which is just the Tartine basic country with 25% cooked polenta and 12% sunflower seeds added into the dough.

 Baker's Pct

90% AP flour

10% Whole wheat flour

75% Water

2% Salt

20% Levain

25% Cooked polenta*

12% Sunflower seeds

[*I added 60 g Bob's Red Mill polenta (corn grits) to 240 g boiling water and cooked it over low heat until the water was just absorbed. I let the porridge cool overnight in the refrigerator. Then I scaled out what I needed (25% = 250 grams for 1000 grams flour). ]

Overall hydration is 77% including the levain. I didn't include the cooked polenta in the hydration level calculation since I'm treating it like an add-in. The oven spring I normally get with the Tartine basic country bread is pretty good. My 1 kg boule ends up about 4.5-inches tall. This polenta boule was about 3.75 inches tall.

Mary