⅓ cup extra-virgin olive oil, 6 garlic cloves, peeled and sliced, ¼ teaspoon table salt
In a 10-inch skillet, combine the oil, garlic, and ¼ teaspoon salt. Cook over medium-low heat, stirring often with a wooden spoon, until the oil is gently bubbling and the edges of the garlic are just beginning to turn golden, 5 to 7 minutes. Turn off the stove and slide the skillet to a cool burner.
3 quarts water, 1 pound spaghetti, 1 tablespoon table salt
Add the water to a large pasta pot or Dutch oven. Bring the water to a boil (big bubbles will vigorously break the surface) over high heat. Carefully add the spaghetti and 1 tablespoon of salt to the boiling water. Use the wooden spoon to carefully push and bend the pasta down into the water.
Cook, stirring often with the wooden spoon, until the spaghetti is flexible but still very firm in the center, about 7 minutes. Turn off the stove. Use a ladle to carefully transfer 2 ½ cups of cooking water to a large liquid measuring cup.
Set a colander in the sink. Drain the spaghetti into the colander (the pot will be heavy and hot; this step is best done by an adult).
Scrape the garlic-oil mixture from the skillet into the now-empty pasta pot (leave the skillet out on the stovetop if you’re going to make the breadcrumbs). Add the drained spaghetti and 2 cups of the reserved cooking water (you’ll have ½ cup left).
Bring the mixture to a boil over medium heat . Cook, using tongs to stir and toss the pasta often, until the water is mostly absorbed, 3 to 5 minutes. Turn off the stove, place a lid on the pasta pot, and let the pasta sit for 5 minutes.