Cook penne in boiling salted water until al dente.
Wash basil leaves thoroughly and pat dry.
Slice garlic thinly.
Heat olive oil in a pan and sauté the garlic to add aroma.
Add the cooked penne, basil, salt, and pepper to the pan and stir-fry, mixing well.
Add Parmesan cheese and mix again.
Transfer to a dish and garnish with basil leaves.