Shrimp Fra Diavolo with Linguine Recipe

Ingredients

• 1 pound dried linguine
• Kosher salt ((to taste))
• 4 tablespoons olive oil ((divided))
• freshly ground black pepper ((to taste))
• 2 pounds extra-large shrimp (21/25 count) ((peeled and deveined))
• 1 large onion ((halved and thinly sliced))
• 4 teaspoons minced garlic
• ½ teaspoon dried oregano
• ¼ teaspoon red pepper flakes ((or to taste))
• 1 cup dry white wine
• 1 can (28 ounces) diced tomatoes
• ½ cup sliced or torn fresh basil leaves ((divided))
• Freshly grated Parmesan ((to serve; optional))