For the Marinade:

• 1 lb chicken breast, cut into 1-inch chunks
• 2.5 tbsp olive oil (preferably Bertolli Extra Virgin)
• 2.5 tbsp lemon juice
• 2 garlic cloves, freshly minced
• 2 tsp oregano
• 1/2 tsp paprika
• 1 tsp salt
• 1/2 tsp pepper
• 1/4 tsp red pepper flakes

For the Salsa:

• 1.25 cups cucumbers, diced into 1/2-inch pieces
• 1 cup tomatoes, seeded and diced into 1/2-inch pieces
• 1 cup bell pepper, diced
• 1/4 cup red onion, finely chopped (about 1/4-inch pieces)
• 2 tbsp parsley, chopped
• 3/4 cup crumbled feta cheese (such as Athenos)
• 1 tbsp lemon juice
• Salt, to taste
• Pepper, to taste

For the Assembly:

• 8 pita breads
• 1/2 cup tzatziki sauce