1 box Azteca® Salad Shells
1 pound raw shrimp, peeled and deveined
4-6 medium zucchini, trimmed
1 ripe avocado
1 cup fresh basil leaves
½ cup unsalted pistachios, shelled
1 teaspoon Old Bay® seasoning
2 tablespoon lemon juice
¾ teaspoon salt, divided
¼ teaspoon black pepper
¼ cup olive oil plus 2 tablespoons divided