Step 1

In a Dutch oven or stockpot over medium high heat, add ground beef and onion and cook until browned, about 3 to 5 minutes, breaking up any clumps with a wooden spoon. Drain well if desired.

Step 2

Stir in broth or water, diced tomatoes and juice, spaghetti, tomato sauce, and taco seasoning. Bring to boil; reduce heat, cover, and simmer until pasta is cooked through, about 11-15 minutes. Stir occasionally to make sure noodles are not clumping together.

Step 3

Remove from heat. Taste for seasonings and add more salt and pepper if desired. Top with cheese and cover until melted, about 2 minutes. Serve immediately, garnished with tomato scallions, and sour cream, if desired.