1. Bring a large pot of water to a boil over high heat. Generously salt boiling water and return to a boil. Add spaghetti and cook until al dente, according to package directions. Drain pasta; set aside.

2. In a large skillet, heat olive oil over medium-high heat. Add meatballs and cook until browned, 5 to 7 minutes. Add marinara sauce and 1/2 cup water; cook until heated through, 5 minutes. Add spaghetti and toss to combine; serve immediately.