Cook the pasta

• Bring a large pot of salted water to a boil.
• Cook the spaghetti until al dente, then drain, reserving a little pasta water.

Sear the shrimp

• Heat the olive oil in a frying pan over medium-high heat.
• Add the shrimp and sear until pink and just cooked through, then set aside.

Build the spicy cream sauce

• Lower the heat, add the butter and garlic, and cook until fragrant.
• Stir in the chili flakes, then pour in the cream and simmer gently.
• Add the grated parmesan and whisk until smooth.

Combine and serve

• Return the shrimp to the pan with the sauce.
• Add the drained spaghetti and toss, loosening with a splash of pasta water.
• Season with salt and black pepper, scatter over the parsley and serve.