Fish Tacos with Mango Salsa Verde

INGREDIENTS

• 1/2 cup chopped peeled mango
• 1/2 cup chopped green tomato
• 2 tablespoons finely chopped red onion
• 4 teaspoons chopped fresh cilantro
• 1 teaspoon fresh lemon juice
• 1/4 teaspoon black pepper
• 1/4 teaspoon chili powder
• 2 (6-ounce) tilapia fillets
• Cooking spray
• 1/2 teaspoon Old Bay seasoning
• 4 (8-inch) whole-wheat flour tortillas
• 1 cup mixed salad greens