12 large shrimp, peeled
8 cloves garlic, unpeeled
2 tablespoons olive oil
1 1/2 cups heavy cream
1/2 cup grated Parmesan, plus more for serving
1/4 cup finely chopped fresh parsley, plus more for serving
Kosher salt and freshly ground black pepper
8 ounces fresh linguine, cooked and drained