Pain de Champagne; no, that's not misspelled
Yesterday, I transferred six gallon of new Sauvignon Blanc wine from its primary fermenter (food-grade plastic bucket), into a secondary fermenter (glass carboy), leaving behind billions of yeast cells that had done their job beautifully. I was diluting the slurry of yeast collected on the bucket's bottom, to make it easier to pour out when I thought, "I wonder if it could bake bread?".