Cajun Shrimp Sheet Pan Dinner

Name: Cajun Shrimp Sheet Pan Dinner
Cuisine: American, Southern, Cajun And Creole
Ingredients: 1.5 lbs baby red potatoes, halved; 2 tablespoons olive oil; 3/4 teaspoon salt; 3/4 teaspoon ground black pepper; 4 ears corn, husked and cut into 1-inch rounds; 3 garlic heads, tops sliced off to expose the cloves, plus 4 garlic cloves, minced; 1 stick unsalted butter, melted; 2 tablespoons old bay seasoning; 2 pounds medium shrimp, peeled and deveined; 2 tablespoons chopped fresh parsley; 1 large lemon, cut into wedges, for serving