Day 1: 1/4 cup of Bob's Dark Rye Flour plus just enough water to make a sponge without extra water and a pinch of instant yeast (maybe a 10th of a teaspoon at most), Overnight at room temperature (covered)
Day2: 260 g of King Arthur Bread Flour plus 1 tsp of yeast, a tablespoon of olive oil, a pinch of salt, and 130 g of water. After some experiments, 50% hydration works best at these proportions. Mix into a ball (I used a Kitchen Aid mixer with a dough hook) add maybe another teaspoon of water and incubate covered with a wet cloth in an oven set to proof and 100F. Turn the heat off once it reaches 100F.
After an hour, stretch and slap, roll back into a ball. Dust with flour, Back in oven
After an hour repeat
After an hour repeat- you should have a well firmed ball of dough. Make three slashes and drop into a hot baking dome (425F), put the lid for 20 min.
Remove lid. reduce heat to 375 and bake for 15 min. Remove and cover with a cloth for 15 min.
The protocol is fairly forgiving as long as you don't reduce the dough to a mushy mess.