Scandinavian Rye Bread

Name: Scandinavian Rye Bread
Prep time: 10 min
Cook time: 27 h
Total time: 27 h
Yield: 20 slices
Ingredients: 350 g water; 30 g sugar; 2 tsp dried instant yeast; 300 g rye flour; 100 g plain flour; 300 g rye grains; 100 g sunflower seeds; 80 g pumpkin seeds; 50 g linseeds; 220 g buttermilk; 180 g dark beer; 2 tsp fine sea salt; 1 Tbsp rolled oats