To prepare blintz, in medium bowl beat water and flour until smooth. Beat in eggs, sugar, and salt. Heat one tablespoon butter over medium heat in 10-inch skillet. Pour 1/3 egg mixture, about 1/2 cup into skillet. Tilt pan to spread mixture evenly. Cook over medium-low heat until lightly browned and set on one side. Turn over to lightly brown second side. Remove from pan and keep warm. Repeat with remaining mixture.

For filling, in microwavable dish, stir together cream cheese, pineapple, cottage cheese, and sugar. Cook in microwave on HIGH until warmed, about 30 seconds. Spoon about 1/2 cup filling onto one side of each blintz. Fold one end up over filling. Then fold both sides over filling, and roll to enclose filling. Serve immediately with fruit, if desired.