Whole Wheat Sandwich Bread

1. FOR THE SPONGE: Combine flour, water, and yeast in large bowl and stir with wooden spoon until uniform mass forms and no dry flour remains, about 1 minute. Cover bowl tightly with plastic wrap and let sit at room temperature for at least 8 hours or up to 24 hours.
2. FOR THE SOAKER: Combine flour, wheat germ, and milk in separate large bowl and stir with wooden spoon until shaggy mass forms, about 1 minute. Transfer dough to lightly floured counter and knead by hand until smooth, 2 to 3 minutes. Return soaker to bowl, cover tightly with plastic, and refrigerate for at least 8 hours or up to 24 hours.
3. FOR THE DOUGH: Tear soaker apart into 1-inch pieces and place in bowl of stand mixer fitted with dough hook. Add sponge, butter, honey, yeast, oil, and salt and mix on low speed until cohesive mass starts to form, about 2 minutes. Increase speed to medium and knead until dough is smooth and elastic, 8 to 10 minutes. Transfer dough to lightly floured counter and knead by hand to form smooth, round ball, about 1 minute. Place dough in large, lightly greased bowl. Cover tightly with plastic and let rise at room temperature for 45 minutes.
4. Gently press down on center of dough to deflate. Spray rubber spatula or bowl scraper with vegetable oil spray; fold partially risen dough over itself by gently lifting and folding edge of dough toward middle. Turn bowl 90 degrees; fold again. Turn bowl and fold dough 6 more times (total of 8 folds). Cover tightly with plastic and allow to rise at room temperature until doubled in size, about 45 minutes.
5. Grease two 8-1⁄2 by 4-1⁄2-inch loaf pans. Transfer dough to well-floured counter and divide in half. Press 1 piece of dough into 17 by 8-inch rectangle, with short side facing you. Roll dough toward you into firm cylinder, keeping roll taut by tucking it under itself as you go. Turn loaf seam side up and pinch it closed. Place loaf seam side down in prepared pan, pressing gently into corners. Repeat with second piece of dough. Cover loaves loosely with greased plastic and let rise at room temperature until nearly doubled in size, 1 to 1-1⁄2 hours (top of loaves should rise about 1 inch over lip of pan).
6. One hour before baking, adjust oven racks to middle and lowest positions, place baking stone on middle rack, place empty loaf pan or other heatproof pan on bottom rack, and heat oven to 400 degrees. Bring 2 cups water to boil on stovetop. Using sharp serrated knife or single-edge razor blade, make one 1⁄4-inch-deep slash lengthwise down center of each loaf. Working quickly, pour boiling water into empty loaf pan in oven and set loaves in pans on baking stone. Reduce oven temperature to 350 degrees. Bake until crust is dark brown and loaves register 200 degrees, 40 to 50 minutes, rotating loaves front to back and side to side halfway through baking. Transfer pans to wire rack and let cool for 5 minutes. Remove loaves from pans, return to rack, and let cool to room temperature, about 2 hours, before slicing and serving. (Bread can be wrapped in double layer of plastic wrap and stored at room temperature for up to 3 days. Wrapped with additional layer of aluminum foil, bread can be frozen for up to 1 month.)

FOLDING BREAD DOUGH
Slide greased rubber spatula or bowl scraper under 1 side of dough; gently lift and fold edge of dough toward middle. Repeat folding as directed in recipe.