HEAT oil in large skillet on medium-high heat. Add next 4 ingredients; cook and stir 3 min. or until onions are crisp-tender. Stir in next 4 ingredients; cook 2 min., stirring frequently and mashing lightly with back of spoon. Remove from heat. Stir in coriander 6and 2 Tbsp. dressing. Refrigerate 15 min.

MEANWHILE, heat oven to 400ºF. Roll out 1 pastry block to 9-inch square on lightly floured surface; cut into 3 (3-inch wide) strips. Cut each strip into 3 (3-inch) squares. Dust squares lightly with flour; stack on plate. Repeat with remaining pastry block.

SPOON about 1 Tbsp. potato mixture onto centre of each pastry square; fold diagonally in half. Firmly press edges together to seal. Place on baking sheet; brush with remaining dressing.

BAKE 18 to 20 min. or until crisp and golden brown.