01 -  Preheat your oven to 220°C (430°F). Place the bell peppers on a baking tray and roast for 15–20 minutes, turning once, until the skins are blistered and charred. Remove, place in a bowl, cover, and let steam for 5 minutes. Peel and remove seeds, then roughly chop the flesh. 
 02 -  Cook the spaghetti in a large pot of salted boiling water according to package instructions until al dente. Drain, reserving 120 ml (½ cup) of pasta water. 
 03 -  While the pasta cooks, heat 1 tbsp olive oil in a skillet over medium heat. Add the chorizo and cook for 3–4 minutes until slightly crispy. Remove and set aside, leaving the oil in the pan. 
 04 -  Add another 1 tbsp olive oil to the skillet. Sauté onion and garlic for 2–3 minutes until softened. Add the chopped roasted bell peppers and cook for 2 minutes more. 
 05 -  Transfer the bell pepper mixture to a blender or food processor. Add the heavy cream, tomato paste, smoked paprika, salt, and pepper. Blend until smooth. 
 06 -  Return the sauce to the skillet over low heat. Stir in the cooked chorizo and keep warm. 
 07 -  In a separate pan, quickly sear the shrimp over high heat for 1–2 minutes per side until just cooked through. Season lightly with salt and pepper. 
 08 -  Add the drained spaghetti to the sauce, tossing to coat. Add reserved pasta water as needed for desired consistency. 
 09 -  Gently fold in the shrimp. Divide among plates, garnish with parsley and Parmesan, and serve with lemon wedges if desired.