Boil water in a pot and cook the spaghetti according to package instructions until al dente.

In a pan, heat olive oil over medium heat. Add minced garlic and red pepper flakes, sauté until fragrant.

Add crushed tomatoes and sardines (with oil) to the pan. Simmer for about 10 minutes.

Season with salt and black pepper to taste.

Drain the pasta and add it to the sauce. Toss to combine.

Serve hot, garnished with chopped parsley and grated parmesan cheese.