Falafel Pitas

INGREDIENTS

• 1/4 cup plain dry breadcrumbs
• 1/4 cup fresh flat-leaf parsley leaves
• 2 tablespoons chopped green onions
• 1 teaspoon ground cumin
• 1/2 teaspoon ground coriander
• 1/4 teaspoon salt
• 1 (15-ounce) can chickpeas, rinsed and drained
• 1 large egg
• 1 garlic clove, chopped
• Dash of ground red pepper
• Cooking spray
• 1/4 cup shredded seeded peeled cucumber
• 1/4 cup plain 2% low-fat Greek yogurt
• 1 teaspoon fresh lemon juice
• 1/8 teaspoon salt
• 2 (6-inch) whole wheat pitas, halved
• 4 Bibb lettuce leaves
• 8 (1/4-inch-thick) tomato slices