Cook the pasta

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

Brown the sausage

• Heat the olive oil in a large skillet over medium-high heat.
• Add the sausage and cook, breaking it up, until browned and cooked through.

Build the cream sauce

• Lower the heat, add the garlic and cook until fragrant.
• Pour in the heavy cream and simmer gently.
• Stir in the parmesan until melted, then season with salt and pepper.

Combine and melt the cheese

• Add the drained pasta to the skillet and toss to coat, loosening with a splash of pasta water if needed.
• Scatter the mozzarella over the top, cover and let it melt.

Serve

• Serve hot straight from the skillet, with extra parmesan and black pepper.