Lemon Sponge Pie
["3 Tbsp. plus 1 tsp. lemon juice", "1 tsp. lemon rind", "1 c. sugar", "3 Tbsp. flour", "3 eggs, separated", "1/2 tsp. salt", "2 Tbsp. butter", "1 1/2 c. hot milk", "pastry for 9-inch crust"]
["Cream butter. Add sugar and egg yolks. Beat well. Add milk. Add flour, salt, lemon juice, grated rind and milk. Fold in stiffly beaten egg whites. Pour into unbaked pie shell. Bake at 325\u00b0 for 40 to 45 minutes or at 450\u00b0 for 10 minutes and at 325\u00b0 for 30 to 35 minutes more."]
["lemon juice", "lemon rind", "sugar", "flour", "eggs", "salt", "butter", "hot milk", "pastry"]