Cook pasta in salted boiling water until al dente. Reserve 1 cup pasta water, then drain.
Melt butter in a pan over medium heat. Add garlic and cook until fragrant.
Add pasta and a splash of pasta water. Toss to combine.
Stir through parmesan. Gradually add more pasta water until sauce is glossy and coats the pasta.
Taste and season with salt if required. Garnish with some chopped fresh herbs (if you have any at home) and serve immediately.