Step 1: Cook the Spaghetti

1. Bring a large pot of salted water to a boil.
2. Cook the spaghetti according to package instructions until al dente.
3. Drain and set aside.

Step 2: Prepare the Taco-Flavored Beef

1. In the same pot, heat olive oil over medium heat.
2. Add diced onions and cook for 2 minutes until softened.
3. Add ground beef and cook until browned, breaking it apart with a spatula.
4. Drain excess grease, if necessary.
5. Stir in taco seasoning, garlic powder, cumin, and chili powder.

Step 3: Combine and Simmer

1. Add diced tomatoes with green chilies, tomato sauce, and beef broth.
2. Stir well and bring the mixture to a simmer.
3. Let it cook for 5 minutes, allowing flavors to meld.

Step 4: Add Spaghetti and Cheese

1. Add the cooked spaghetti back into the pot and mix well.
2. Sprinkle shredded cheddar and Monterey Jack cheese over the top.
3. Cover and let sit for 2 minutes until the cheese melts.

Step 5: Serve and Enjoy

1. Garnish with chopped cilantro and sliced jalapeños, if desired.
2. Serve hot and enjoy!