Fresh Shrimp and Avocado Nachos

Ingredients

• 4 plum tomatoes, chopped
• 3 tomatillos, husked and chopped
• 4 jalapeno peppers, seeded and finely chopped
• 1 small onion, chopped
• 2 garlic cloves, minced
• 1/4 cup minced fresh cilantro
• 3 tablespoons olive oil
• 2 tablespoons seasoned rice vinegar
• 1 tablespoon lime juice
• 1-1/2 teaspoons sea salt
• 1/2 teaspoon dried oregano
• 1 pound peeled and deveined cooked shrimp (31-40 per pound), coarsely chopped
• TOPPING:
• 2 medium ripe avocados, peeled and pitted, divided
• 1/2 cup sour cream
• 2 tablespoons lime juice
• 8 cups tortilla chips
• 1 cup shredded lettuce