Melt butter in a 13x9x2-inch baking dish; set aside. Combine next 4 ingredients in a large bowl; beat well. Add bread cubes, and let stand 5 minutes. Fold in blueberries and lemon rind; spoon into prepared dish. Bake at 350 degrees for 35 minutes or until lightly browned and puffed. Serve warm with Custard Sauce. Yields 10 servings. CUSTARD SAUCE: Combine eggs, sugar, and salt in top of a double boiler, beating well. Gradually stir about 1/2 cup milk into egg mixture; add remaining milk, stirring constantly. Bring water in bottom of double boiler to a boil. Reduce heat to low; cook custard over hot water, stirring occasionally, about 15 minutes or until mixture thickens. Cool slightly. Add vanilla and lemon peel. Yields 1-1/3 cup. SOUTHERN LIVING ELTON DARBY TUNICA, MS From a collection of my mothers (Judy Hosey) recipe box which contained lots of her favorite recipes, clippings, etc. Downloaded from Glens MM Recipe Archive, G Internet.