Chicken Burgers in Pita Pockets with Tzatziki - California Avocados

Ingredients

• 1 lb. ground chicken breast
• 1 cup crumbled reduced-fat feta cheese, divided
• 1/4 cup minced red onion
• 1 clove garlic, minced
• 1 tsp. dried oregano
• 1 tsp. kosher salt
• 1/4 tsp. ground pepper
• 1/2 English cucumber, sliced crosswise
• 1 ripe, medium Fresh California Avocado, seeded, peeled and sliced
• 1 cup grape tomatoes, halved
• 1/4 cup thinly sliced red onion
• 4 whole wheat pita breads
• Tzatziki (recipe follows)
• Tzatziki
• 1/2 cup nonfat plain yogurt
• 1/2 cup finely grated cucumber
• 1 Tbsp. chopped fresh mint
• 2 tsp. lemon juice
• 1/2 tsp. salt