Moroccan Balls

Ingredients

• 1 large egg
• 3 cloves garlic, minced
• 1 teaspoon ground cumin
• 1 teaspoon ground allspice
• 1/4 cup fresh cilantro, finely chopped
• 1 1/4 teaspoons kosher salt
• 1/2 teaspoon black pepper
• 1 1/4 pounds ground beef, 85% lean
• 1/3 cup panko
• vegetable oil, to taste, for oiling the grill
• couscous, optional, to taste, cooked and warm, for serving
• 1/2 English cucumber, peeled, halved lengthwise, seeded, finely diced
• 1 cup Greek yogurt, low-fat or whole milk
• 2 tablespoons lemon juice
• 1 tablespoon fresh dill, chopped
• 1/4 teaspoon kosher salt
• 1/4 teaspoon black pepper