this bread can be made
without sourdough starter
just mix and let rise

1 c rye chef+1 c rye flour+1/2 c water, covered, rested 8 hours, room temperature; 4-5 c white flour, pinch yeast, 1 t kosher salt, 1 c room temperature water
knead to combine; chill, covered, overnight; fold 5x, rest, covered, room temperature, 3 hours; bake in oiled preheated dutch oven, lid on, 450 F, 60-70 minutes