Start by bringing 4 quarts of water to a rolling boil in a large pot over high heat. Once boiling, add 2 tablespoons of salt to the water.

Carefully add the spaghetti to the boiling water and cook for 8-10 minutes until al dente. Reserve 1 cup of pasta water, then drain.

In a large skillet, heat 2 tablespoons of olive oil over medium heat. Add minced garlic and red pepper flakes. Sauté for 1-2 minutes.

Add the drained spaghetti to the skillet and toss to coat in the garlic oil. Add reserved pasta water gradually if needed.

Stir in chopped parsley and grated Parmesan cheese. Adjust seasoning with salt if needed.

In a mixing bowl, combine softened butter, minced garlic for the garlic bread, parsley, Parmesan, and garlic powder. Mix until smooth.

Slice the Italian bread in half lengthwise and spread the garlic butter mixture on both sides.

Preheat oven to 375°F (190°C). Bake for 10-12 minutes until golden and crispy. Broil for an additional 1-2 minutes if desired.

Remove from oven, let cool for a few minutes, then slice and serve.