BEAT cream cheese and bistro sauce in 6-qt. bowl of electric mixer fitted with paddle attachment (use same size bowl for trial reipe) on low speed 1 min or until well blended. Scrape paddle and side of bowl. Add chives. Mix well; cover. Refrigerate until ready to use.
FOR each sandwich: Spread one side of bread slice with 4 tsp. of the cream cheese mixture. Top with 1/2 oz. cucumber slices, 2 oz. salmon and 1 tsp. onions.
PLACE yogurt in squeeze bottle; drizzle about 1/2 tsp. yogurt over onions and salmon. Top with 1 rounded Tbsp. greens in center of sandwich.