How to Make It
Heat broiler. In a medium bowl, combine the cucumber, scallions, vinegar, oil, and ¼ teaspoon each salt and pepper.
Thread shrimp onto 6-inch skewers, wrap the skewer ends with foil, and place on a broiler-proof rimmed baking sheet.
Broil, basting with the hoisin sauce, until opaque throughout, 2 to 3 minutes per side; sprinkle with sesame seeds. Serve with the cucumber salad.