I realize the recipe is about the pepper but all 3 of us voted that one tablespoon was enough. Close to 3 would have been way too much and ruined the taste. But that is just us. I posted what we experienced only as a suggestion if other people make it.
As far as the spaghetti was concerned you're cooking it for 10 minutes but 5 minutes is actually on simmer and it warns you to not over cook it and make sure it comes out al dente. And since you're using less water you don't need that much salt again in our opinion. Mind you you're using some of the pasta water so that is why I cut back on the salt. I did warn everyone to taste it before they grabbed the salt shaker.
I'm not a fan of the normal spaghetti so we always use the thin spaghetti and check for doneness. I think 6 minutes is not quite enough time but it's all in preference.
God. It tasted as if he'd just thrown in a pound of finely ground pepper. That was the ONLY thing it tasted of...
I was thinking the same thing and I'm glad I only used a tablespoon. It was just enough to give it the taste of the pepper.