PREHEAT oven to 350° F. Grease or paper-line 18 muffin cups.
COMBINE flour, 1/2 cup sugar, baking powder, cinnamon and salt in small bowl. Beat milk, Nestea, vegetable oil, egg and vanilla extract in large mixer bowl until tea is dissolved. Stir in apple. Gradually stir in flour mixture until moistened. Spoon into prepared muffin cups, filling 2/3 full. Sprinkle evenly with 3 tablespoons sugar.
BAKE for 20 to 25 minutes or until wooden pick inserted in center comes out clean. Cool in pans on wire racks for 10 minutes; remove to wire racks to cool completely.