Smoked Salmon Cucumber Cups with rolls

1 large English cucumber , sliced thin 1/2 large red onion , sliced thin 1/2 cup sour cream 1/2 cup cream cheese 2 tablespoons capers , drained and chopped a[...]

1 cucumber , peeled seeded and cut into 2-inch julienne strips 1/4 cup seasoned rice vinegar 1/2 teaspoon sesame oil 2 teaspoons fresh ginger , finely grated,[...]