Blueberry Muffins With Lemon
["2 c. sifted flour", "1/3 c. sugar", "3 tsp. baking powder", "1 tsp. salt", "1 egg, beaten", "1 c. milk", "1/4 c. melted butter, cooled", "1 c. fresh or thawed blueberries", "1 Tbsp. sugar and grated lemon rind, mixed"]
["Sift together flour, sugar, baking powder and salt.", "Mix with fork the beaten egg, milk and butter."]
["flour", "sugar", "baking powder", "salt", "egg", "milk", "butter", "blueberries", "sugar"]