Cook the pasta according to the package directions. Drain and set aside.
Heat olive oil in a skillet over medium heat. Add garlic and onion, cooking until soft and fragrant.
Stir in the gochujang paste and let it warm through for about 1 minute.
Pour in the cream and bring to a gentle simmer. Stir until the sauce thickens slightly.
Add parmesan, salt, and black pepper. Mix until smooth and creamy.
Toss the pasta with the sauce until well coated.
Top with fresh parsley before serving.