Bring a large pot of salted water to a boil. Add the spaghetti and cook according to the package directions until al dente, about 9 to 11 minutes.

While the pasta cooks, heat 1 tablespoon of olive oil in a large skillet or Dutch oven over medium heat. Add the pine nuts and toast them, stirring frequently, until golden brown, about 2 to 3 minutes. Remove the pine nuts from the pan and set aside.

In the same skillet, add the remaining 1 tablespoon of olive oil and the finely chopped onion. Sauté until the onion is soft and translucent, about 5 minutes, then stir in the minced garlic and cook until fragrant, about 30 seconds.

Add the ground beef to the skillet, breaking it apart with a wooden spoon. Cook until the meat is completely browned and no longer pink, about 7 to 8 minutes. Drain any excess grease if desired.

Stir the ground allspice, cinnamon, salt, and black pepper into the beef mixture, cooking for 1 minute to bloom the spices. Add the tomato paste and cook for an additional 2 minutes, stirring constantly until it turns a deep, brick-red color.

Pour in the crushed tomatoes and pomegranate molasses, stirring well to combine. Reduce the heat to low, cover, and let the sauce simmer gently for 15 to 20 minutes so the flavors meld together beautifully.

Drain the cooked spaghetti and add it directly into the skillet with the meat sauce, tossing vigorously to ensure every noodle is evenly coated. Serve hot, garnished with the toasted pine nuts and fresh chopped parsley for a true Middle Eastern presentation.