4 large ripe pears, about 2 pounds, (Bartlett or Anjou), peeled, cored and sliced very thin
1/3 cup flour
4 large eggs
1 tsp. vanilla
7 T. unsalted butter, room temperature
Preheat oven to 300 degrees. Butter a 9”-round cake tin. In a large skillet cook ¾ cup of the sugar over moderate heat until it begins to melt. Continue cooking until it turns a golden caramel. Meanwhile, sprinkle the yeast over one tablespoon of lukewarm water.
Pour the hot caramel into prepared pan. Make sure caramel covers the bottom. (If your caramel has hardened up before you allow it to cover the bottom of the pan, place the pan, using potholders, over one of your stovetop burners and hover it over the heat until the caramel begins to melt.) Arrange thinly sliced pears in slightly overlapping circles on top of caramel.
In a large bowl, beat the eggs, then add the flour, 1/4 c. sugar, the yeast mixture and vanilla. In another large bowl (sorry about all of the bowls!) beat the butter with an electric mixer (or standmixer) until smooth. Add the egg mixture and beat until the mixture is combined well, but do not overbeat. It will look slightly curdled. Pour the mixture over the pears being careful not to dislodge the pears.
Bake the cake on the middle rack for one hour or until golden. Let cool on rack for five minutes and then run a knife around the edges, and invert onto a large dish or platter deep enough so the syrup won’t flow over the edges. Serve warm.