1.Sift flour into large bowl; rub in butter. Stir in basil, tomato paste and pepper, and add enough water to form a firm dough. Turn onto a lightly-floured surface and knead until smooth. Cover and refrigerate 30 minutes.
2.Preheat oven to 180°C (160°C fan-forced). Grease oven trays.
3.Roll dough on floured surface until 2mm thick. Prick all over with fork and cut into 4cm squares. Place about 1cm apart on trays. Brush with a little egg white and sprinkle with a little salt.
4.Bake crackers about 15 minutes or until lightly browned; cool on trays.