Cook the spaghetti pasta: while the sauce is simmering, bring a large pot with 4 quart of water in it to a boil. once the water is boiling. add 2 Tbsp of salt. when the water returns to a boil add the pasta to the pot. Leave uncovered while you cook the pasta on high heat with a vigorous boil. Put a timer on for 8-10 minutes, or whatever your pasta package directions say is appropriate for al dente (cooked but still a little firm). Drain.