Bring a large pot of salted water to a boil. Add the spaghetti and cook according to package instructions until al dente.

In a skillet, heat the olive oil over medium heat. Add the minced garlic and red pepper flakes, sautéing until fragrant, about 1-2 minutes.

Drain the pasta and add it to the skillet with the garlic oil. Toss to coat the pasta evenly.

Add chopped parsley, salt, and pepper to taste. Toss again and serve hot, topped with grated parmesan if desired.