Boil the pasta

• Bring salted water to a boil in a stockpot.
• Cook the pasta until al dente, then drain and set aside, keeping some pasta water.

Sauté the aromatics

• Melt the butter in a frying pan.
• Add the onion and garlic and cook until fragrant.
• Add the tuna and mushroom and cook until softened.
• Season with pepper.

Make the cream sauce

• Pour in the cream and a little pasta water.
• Add the basil leaves and parmesan cheese and stir until melted.

Combine and serve

• Add the pasta and mix until well coated.
• Garnish with parsley leaves and serve.