Ingredient:

• 1 cup plain Greek yogurt or sour cream
• 1/4 cup minced fresh cilantro
• 3 tablespoons lemon juice
• 2 tablespoons lime juice
• 1/8 teaspoon plus 1/4 teaspoon salt, divided
• 2 tablespoons olive oil
• 2 medium green pepper, chopped
• 4 fresh green chiles, such as Hatch or Anaheim, seeded and chopped
• 1/2 cup chopped red onion
• 1 pound uncooked shrimp (31-40 per pound), peeled and deveined
• 4 garlic cloves, minced
• 1 teaspoon ground cumin
• 8 corn tortillas (6 inches), warmed
• 2 cups torn lettuce