Spicy Cajun Shrimp Pasta with Sausage - Serving Dumplings

Ingredients

• 14 ounces linguine
• 1 tbsp olive oil
• 1 tbsp unsalted butter
• 1 pound shrimp (peeled and deveined)
• 7 ounces smoked sausage
• 1 yellow onion (finely chopped)
• 4 garlic cloves (minced)
• 3 tbsp Cajun seasoning (divided)
• ½ tsp chili flakes (more to taste)
• 1 tsp salt
• 1 tsp black pepper
• 1 tsp dried oregano
• ½ cup dry white wine
• 3 tbsp double concentrated tomato paste
• 2 cups puréed tomatoes
• 2 tbsp chopped parsley (more for serving)