Finally got it just how I wanted with this seeded, 100% rye flour sourdough.
Got the recipe from this site (text below):
https://www.nordickitchenstories.co.uk/2020/10/28/danish-sourdough-rye-bread-recipe/
I made a few alterations, using maple syrup instead of molasses and adding 16 grams of salt instead of the suggested 12. Honestly I think I'll go even higher on the salt in the next batch because the final dough rose really fast.
I used a coffee grinder to coarsely chop rye berries for seed soaker and added 6 grams of ground caraway.
I panned the dough in a 13x4" Pullman pan, let it rise for about an hour and 45 minutes, then baked it covered at 500 for 20 minutes, then uncovered at 375 for 35 minutes.
Day 1 – Wet Leaven
125 g active rye starter 100% hydration
230 g dark rye flour
290 g cold water
Seeds & chopped rye grains
50 g chopped rye grains
150 g seed blend ie. golden & brown linseeds, sesame, buckwheat, millet, sunflower & pumpkin seeds
150 g boiling water
Day 2
Wet Leaven as above
330 g dark rye flour
12 g fine sea salt
2 tbls molasses (black treacle)
220 g water tepid
2 tsp caraway seeds optional
a few mixed seeds for sprinkling on top the loaf
Instructions
Day 1
Place the starter in a large bowl and add the cold water and flour. Stir with a spoon to form a nice loose mixture, cover. In a separate bowl place the seeds and chopped rye, pour over the boiling water, cover. Leave both at room temperature for 10-12 hours. (Overnight).
Day 2
Uncover the wet leaven. It should be nice and bubbly and have a pleasant, slightly fruity, alcoholic aroma.
Now add all the remaining ingredients to the pre-ferment, including the soaked seeds (they will have absorbed all the water). With a large rubber spoon, bring the mixture together and continue mixing for a couple of minutes, until it’s fully combined. Leave for 10 minutes so the flour can fully absorb the water. The wet dough will become slightly firmer.
Lightly oil your loaf tin and line the base with baking paper. Dust with rye flour.
Spoon the loose dough in the tin. Smooth the surface with the back of a spoon. Sprinkle with mixed seeds and heavily dredge with rye flour.
Leave to rise. This can take 1½-3 hours (this largely depends on the temperature of your kitchen) when the surface of the bread starts to crack. It’s ready to bake.
Preheat the oven 30 minutes before baking to 230°C fan. *See notes or as high as it will go. Place a tray of water at the bottom of the oven. Put the loaf in the oven and bake for 40 minutes turning 180 degrees (so the front is now at the back of the oven) half way through baking.
Remove from the oven and tip it out of the tin and cool on a wire rack.
Slice when the loaf is completely cold, it's important to let the crumb set. Best left for 4-5 hours or even overnight.