Curried Beef Pitas with Cucumber Sauce

Ingredients

• 1 cup fat-free plain Greek yogurt
• 1 cup finely chopped peeled cucumber
• 1 tablespoon minced fresh mint
• 2 garlic cloves, minced
• 2 teaspoons snipped fresh dill
• 2 teaspoons lemon juice
• 1/4 teaspoon salt
• PITAS:
• 1 pound lean ground beef (90% lean)
• 1 small onion, chopped
• 1 medium Golden Delicious apple, finely chopped
• 1/4 cup raisins
• 2 teaspoons curry powder
• 1/4 teaspoon salt
• 8 whole wheat pita pocket halves