Once your water starts to boil and you add the salt to the boiling water, it will bubble furiously. That’s when you add the pasta. Make sure you add all the pasta at once so they’ll cook evenly. Once all the pasta is submerged, give it a quick stir with a spoon and put the lid back on to get the water back to a boil as quickly as possible. Start your timer the moment the water returns to a boil. Remove or partially remove the lid, reduce the heat slightly, and keep the water at least at a good simmer for the required cooking time. If you’re adding the pasta to a warm saucepan to mix everything before serving (which I highly recommend), drain the pasta 1 minute earlier than the instructions tell you.