Pomegranate Glazed Lamb Lollipops with Feta Tzatziki

Name: Pomegranate Glazed Lamb Lollipops with Feta Tzatziki
Ingredients: 1/2 cup pomegranate juice; 1 teaspoon cornstarch; 2 tablespoons light brown sugar; 2 tablespoons honey; 2 tablespoons Dijon mustard; Kosher salt and freshly cracked black pepper; 6 lamb rib chops, slightly frenched; Vegetable oil, for oiling grill grates; 1/2 cup crushed roasted pistachios; Feta Tzatziki, recipe follows; Fresh mint, chiffonade, for garnish; 1/2 English cucumber; Kosher salt and freshly ground black pepper; 1 cup whole-fat Greek yogurt; 4 ounces crumbled feta; 1 tablespoon fresh lemon juice; 1 tablespoon chopped fresh mint; 1 teaspoon honey; 1 clove garlic, minced or pressed