Bring a generous 2 quarts of water and 1 tablespoon of table salt to boil in a large pot. Using back of the box cooking times as a guide, add pasta to the water, stirring several times at the beginning to prevent sticking. The last 4 minutes of the pasta cooking time add the broccoli; cook until bright green and tender-crisp. The last minute, add the spinach and return water to a simmer.