Preheat oven to 375. Wash and drain the chicken livers. Remove all fat and any discolored spots. If you find one with a green area, which is the gall, throw it away. It would make everything taste bitter. Arrange the livers on a foil lined baking sheet and bake for 30 minutes at 375.While livers are baking, saute the onions in the schmaltz (chicken fat)