Grilled Summer Shrimp Salad Recipe

Name: Grilled Summer Shrimp Salad Recipe
Ingredients: 2 tablespoons olive oil; 2 tablespoons lemon juice, divided; 1 tablespoon parsley, minced, plus more for garnish; ½ teaspoon garlic powder, divided; ½ teaspoon fine sea salt, divided; ½ teaspoon black pepper, divided; 20 medium raw shrimp, shelled and deveined, tail on or off; 2 tablespoons red wine vinegar; ¼ cup mayonnaise; 4 cups butter lettuce or romaine hearts, torn into bite-sized pieces; ½ cup cherry tomatoes, halved; ¼ cup raw sweet corn