Greek Meatballs with Tzatziki Sauce

Ingredients

• 1 pound lean ground beef
• 1/4 cup panko breadcrumbs
• 1/4 cup chopped fresh leaf parsley
• 3 tablespoons grated onion
• 1 clove garlic, minced
• Zest of a lemon
• 2 tablespoons fresh lemon juice
• 1 egg
• 1 teaspoon dried oregano
• 1/2 teaspoon ground coriander
• 1/2 teaspoon ground cumin
• 1/4 teaspoon ground cinnamon
• Kosher salt and black pepper to taste
• 2 ounces cubed or crumbled feta cheese (optional, for stuffing)
• 1/2 cup grated English cucumber, excess liquid squeezed out
• 1 cup plain non-fat Greek yogurt
• Juice of half a lemon
• 2 teaspoons chopped fresh dill or 1/2 teaspoon dried
• 1/4 teaspoon grated garlic