Cook the spaghetti according to package instructions until al dente.

In a pan, heat olive oil over medium heat and sauté garlic until fragrant.

Add crushed tomatoes, olives, capers, and anchovies to the pan. Stir and let simmer for about 10 minutes.

Add red pepper flakes, salt, and pepper to taste.

Drain the spaghetti and toss it with the sauce.

Serve hot, garnished with fresh herbs if desired.