Bring a medium pot of salted water to a boil and cook the chickpea spaghetti according to package directions until al dente.
While the pasta cooks, heat the olive oil in a large skillet over medium heat.
Add the diced yellow onion and sauté for 3-4 minutes until translucent.
Stir in the minced garlic and cook for another 30 seconds until fragrant.
Add the lean ground beef to the skillet, breaking it up with a wooden spoon, and cook until fully browned.
Drain any excess liquid from the skillet, then pour in the tomato puree.
Season the beef mixture with dried oregano, sea salt, and black pepper, allowing it to simmer on low for 5 minutes.
Reserve 2 tablespoons of pasta water before draining the spaghetti.
Toss the cooked spaghetti with the meat sauce, adding the reserved pasta water if needed to reach your desired consistency.
Plate the spaghetti and top with nutritional yeast and fresh chopped parsley before serving.